distinguish hydrometer File Haar Hygrometer.jpg thumb A dial hygrometer, in this case a hair tension style. Note nonlinear scale. A hygrometer IPA en ha r m t UK is an instrument used for measuring the moisture content in the environment. Humidity measurement instruments usually rely on measurements of some other quantity such as temperature, pressure, mass or a mechanical or electrical change in a substance as moisture is absorbed. By calibration and calculation, these measured quantities can lead to a measurement of humidity. Modern electronic devices use temperature of condensation, or changes in electrical capacitance or Electrical resistance resistance to measure humidity changes. Types Metal pulp coil type The familiar metal paper coil hygrometer is useful for giving a dial indication of humidity changes, but it appears most often in very inexpensive devices and their accuracy is very limited. A search through many identical units in a display might show differences in indicated humidity of 10 or more. In these devices, humidity is absorbed by a salt impregnated paper strip attached to a metal coil, causing it to change shape. These changes in length analogous to those in a bimetallic ... thumb Electronic hygrometer Dewpoint is the temperature at which a sample of moist air or any other ... hygrometer A Gravimetric Hygrometer measures the mass of an air sample compared to an equal ... accurate instruments, called transfer standards. Chilled mirror hygrometer A chilled mirror hygrometer ... humidity Hygrometer Wikisource1911Enc http www.ima.co.uk theory.html IMA moisture measurement ... equipment Category Psychrometrics ar az Hiqrometr ca Higr metre cs Vlhkom r da Hygrometer de Hygrometer et H gromeeter el es Higr metro eu Higrometro fr Hygrom tre gl Higr metro ko ... nl Hygrometer ja no Hygrometer nn Hygrometer pl Wilgotno ciomierz pt Higr metro ro Higrometru ru simple Psychrometer sk Vlhkomer sl Higrometer fi Kosteusmittari sv Hygrometer te ... more details
An Electronic component electronic device analogous to a thermostat but which responds to relative humidity not temperature . Humidistats are utilized in a number of devices including dehumidifiers , humidifiers , and microwave ovens . In humidifiers and dehumidifiers the humidistat is used where constant relative humidity conditions need to be maintained such as a refrigerator , greenhouse , or HVAC climate controlled warehouse . When adjusting the controls in these applications the humidistat would be what is being set. In microwaves they are utilized in conjunction with smart cooking 1 button features such as those for popcorn bag microwave popcorn . Humidistats employ hygrometer hygrometers but are not the same. A humidistat has the functionality of a switch and is not just a measuring instrument like a hygrometer is. Electronics stub Electronic component Category Switches Category Temperature control ... more details
United Kingdom to supply a Transfer Standard Dewpoint Hygrometer model S4000 to it s newly built national ... Hygrometer, both built and commissioned by SIRA. The laboratory accreditation arm of NPL, known at the time ... more details
The dry bulb temperature is the temperature of air measured by a thermometer freely exposed to the air but shielded from radiation and moisture . Dry bulb temperature is the temperature that is usually thought of as air temperature, and it is the true thermodynamic temperature. It is the temperature measured by a regular thermometer exposed to the airstream. Unlike wet bulb temperature , dry bulb temperature does not indicate the amount of moisture in the air. In construction , it is an important consideration when Design designing a building for a certain climate . Nall called it one of the most important climate variables for human comfort and building energy efficiency. ref Nall, D. H. 2004 11 . Looking across the water Climate adaptive buildings in the United States & Europe. In The Construction Specifier , 57, 50 56. ref See also Psychrometrics Psychrometric chart Wet bulb temperature Hygrometer Atmospheric thermodynamics References references br Meteorological variables climate stub Category Atmospheric thermodynamics ca Temperatura seca es Temperatura Temperatura seca ja nn T rrtemperatur ... more details
for the chambers used in chemistry Desiccator A dry box is a storage container in which the interior is kept at a low level of humidity. Dry boxes are used to safely store items which would otherwise be damaged or adversely affected by excessive humidity , such as Camera cameras and Camera lens lenses to prevent fungal growth , and musical instruments to prevent humidity induced swelling or shrinkage of wooden instrument parts . They are also used in the storage of surface mount electronic components prior to circuit board assembly. Types Desiccant boxes A simple dry box can consist of nothing more than a sealed, airtight box containing a desiccant such as silica gel or anhydrous calcium chloride. These can be easily built at relatively low cost. However, the humidity level in such boxes cannot be controlled or regulated owing to the difficulty of gauging the quantity of desiccant required to achieve a certain humidity level. Electronic dry boxes Electronic dry boxes contain a small Thermoelectric cooling peltier cooler , which remove moisture from the air by condensing it out. A control dial is usually provided which permits the user rough adjustment of the humidity level. More sophisticated designs link the cooler to a settable digital hygrometer, allowing very precise humidity level control. References references http www.XDry.com Xdry.com http www.drycabinets.com DryCabinets.com http www.2spi.com catalog boxes basic glove.shtml http www.2spi.com catalog boxes nitro box.shtml Category Tools tool stub ... more details
rewrite date January 2011 John Coventry 1735 1812 , constructor of philosophical instrument s, was born in Southwark in 1735. He made a position through the care with which his instruments were made. He was the inventor of a new hygrometer , more accurate than any which had been previously in use. This instrument was very generally employed by the chemist s and other scientific men of his day. His telescope s were found to be more accurately adjusted than those usually employed, and the lenses with which they were fitted were more truly ground. His graduations were especially correct. He was a friend of Benjamin Franklin , who appears to have consulted him on questions connected with electrical apparatus . Coventry died in 1812. References reflist one source date January 2011 Persondata Metadata see Wikipedia Persondata . NAME Coventry, John ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH 1735 PLACE OF BIRTH DATE OF DEATH 1812 PLACE OF DEATH DEFAULTSORT Coventry, John Category 1735 births Category 1812 deaths Category People from Southwark Category Scientific instrument makers ... more details
include locking bow spinners, a hygrometer and a humidifier. Second to safety, aesthetic appeal and convenience ... hygrometer.JPG right thumb 195px The Musafia hygrometer Protecta System increases load bearing capability ... of the micro climate within the case Hygrometer standard on all models Thermometer DIMUS II ... more details
infobox Book See Wikipedia WikiProject Novels or Wikipedia WikiProject Books name Gub Gub s Book, An Encyclopaedia of Food title orig translator image Image Gub Gub s Book.jpg thumb image caption author Hugh Lofting illustrator Hugh Lofting cover artist country United Kingdom language English language English series Doctor Dolittle genre Fantasy novel Fantasy , Children s novel publisher release date 1932 in literature 1932 media type Print Hardcover and Paperback pages isbn N A preceded by followed by Gub Gub s Book, An Encyclopaedia of Food is a 1932 children s book in the Doctor Dolittle series by Hugh Lofting . Gub Gub the pig was one of the first animals with whom Doctor Dolittle learned to talk and appears in most of the books. This book features stories from and about Gub Gub s attempt to write an encyclopedia of food. The frontispiece of the book introduces An Encyclopaedia of Food in Twenty volumes , going on to explain that Prof. Gub Gub Announces that owing to the high cost of living the other 19 volumes of this GREAT WORK have been Temporarily Postponed . The book takes the form of a Scheherazade story, with chapters unfolding evening by evening. As Gub Gub deals patiently with his raucous animal friends, they are drawn into his world and find out such vital information on the food map as where King Alfred burnt the cakes. A book readable by adults as well as children, who will possibly better appreciate the value and practicality of the gingersnap hygrometer . Doctor Dolittle books Category 1932 books Category Doctor Dolittle books Category British novels Category History of literature in the United Kingdom child fantasy novel stub ja ... more details
Unreferenced stub auto yes date December 2009 File Veldstraat, Ghent, Belgium.jpg thumb right 220px Tobacconist in Ghent , Belgium . date ??? File Cigar Store Figures.jpg thumb right 220px 19th century cigar store figures from Mercer Museum in Doylestown, Pennsylvania . A tobacconist is an expert dealer in tobacco in various forms and the related accoutrements. Such accoutrements include smoking pipe tobacco pipes , lighters , match es, pipe cleaner s, pipe tampers, ashtrays, humidifier humidification devices , hygrometer s, humidor s, cigar cutter s, and more. Books and magazines, especially ones related to tobacco are commonly offered. Items irrelevant to tobacco such as puzzles, games, figurines, hip flask s, canes or other walking stick s, and candy are sometimes sold. A tobacconist shop is traditionally represented by a Cigar store Indian wooden Indian positioned nearby. Uses in art The Tobacconist, Victorian Walk is a featured exhibit at the Museum of London . It showcases shops in an effort to recreate the late 19th century. See also Cigar Cigarette Humidor Gallery gallery File Cigarindian1.jpg Modern tobacconist in Windsor, Berkshire Windsor UK . Image Almanach Chronique de Jersey 1892 Hodgetts tabac.jpg An advertisement for a tobacconist from the almanac of La Chronique de Jersey , 1892 gallery Category Tobacco Category Sales occupations Job stub ca Estanc cs Trafika de Tabaktrafik es Estanco fr D bit de tabac it Tabaccheria mk nl Sigarenwinkel pl Trafika pt Tabacaria scn Tabbaccar a ... more details
Image weather house.jpg thumb A weather house is depicted on this New Year s Day greeting card by the Czech Republic Czech artist Tavik Frantisek Simon . A weather house is a folk art device in the shape of a small Germany German or Alps Alpine chalet that indicates the weather . A typical weather house has two doors side by side. The left side has a girl or woman, the right side a boy or man. The female figure comes out of the house when the weather is sunny and dry, while the male comes out to indicate rain . In fact, a weather house functions as a hygrometer embellished by folk art. The male and female figures ride on a balance bar, which is suspended by a piece of catgut or hair. The gut relaxes or shrinks based on the humidity in the surrounding air, relaxing when the air is wet and tensing when the air is dry. This action swings one figure or the other out of the house depending on the humidity. ref http www.rmets.org education weatherclub primary houses.php Weather houses at the Royal Meteorological Society ref Weather houses are associated in the popular mind with Germany or Switzerland , and are often decorated in the style of a cuckoo clock . Many weather houses also bear a small thermometer on the part between the two doors that conceals the gut suspension, and many also contain a piggy bank . Cultural influence A one act English comic opera called Weather or No , about the male and female figures in a weather house falling in love, became popular when it was played as a companion piece to The Mikado in 1896 97. In contrast, the term Weather House in the United States refers to buildings built by the U. S. Signal Service and then the U. S. Weather Bureau to house the instruments and Chief Weather Observers so that they could do their job. For more information see the U.S. Weather Bureau. References reflist climate stub Category Weather lore Category Meteorological instrumentation and equipment de Wetterh uschen nl Weerhuisje ... more details
English ref In 1783, the first hair hygrometer is demonstrated by Horace B n dict de Saussure . In 1806 ... from at the site where it is mounted. A hygrometer measures the relative humidity at a location ... more details
incomplete list date May 2011 This is a list of measuring device s . class wikitable tool Device Quantity Measurement measured accelerometer accelerations actinometer heating power of sunlight alcoholometer alcoholic strength of liquids altimeter altitude ammeter electric current anemometer windspeed atmometer rate of evaporation audiometer hearing Hydrometer Barkometer barkometer tanning liquors used in tanning leather barometer air pressure bettsometer integrity of fabric coverings on aircraft bevameter mechanical properties of soil bolometer electromagnetic radiation caliper distance calorimeter heat of chemical reactions cathetometer vertical distances ceilometer height of a cloud base chronometer or clock time clap o meter volume of applause Tristimulus colorimeter colorimeter colour creepmeter slow surface displacement of an active geologic fault in the earth declinometer magnetic declination densimeter specific gravity of liquids densitometer degree of darkness in photographic or semitransparent material diffractometer structure of crystals dilatometer volume changes caused by a physical or chemical process disdrometer size, speed, and velocity of raindrops dosimeter exposure to hazards, especially radiation durometer hardness dynameter magnification of a telescope dynamometer force or torque elaeometer specific gravity of oils electrometer electric charge eudiometer change in volume of a gas mixture following combustion evaporimeter rate of evaporation galvanometer electricity gas pycnometer volume and density of solids graphometer angles heliometer variation of the sun s diameter hydrometer specific gravity of liquids hygrometer humidity inkometer ink interferometer wave interference katharometer composition of gases lactometer specific gravity of milk light meter light in photography magnetometer strength of magnetic fields manometer pressure mass spectrometer masses of ions, used to identify chemical substances through their mass spectra micrometer small ... more details
Taxobox name Red legged running frog image Kassina maculuata.jpg status LC status system IUCN3.1 regnum Animalia phylum Chordata classis Amphibia ordo Anura familia Hyperoliidae genus Kassina species K. maculata binomial Kassina maculata binomial authority Andr C3 A9 Marie Constant Dum C3 A9ril Dum ril , 1853 synonyms The Red legged running frog Kassina maculata is a frog species of the Hyperoliidae family. They are silvery greyish brown with dark brown to black spots, and derive their name from bright red coloring on the ventral side of their hind legs. Adult body length is typically 6 to 7.5 centimeters. These frogs have vertical pupils. Other common names include brown spotted tree frog, red legged Kassina, red legged pan frog, spotted running frog, tiger leg running frog , and vlei frog . Habitat K. maculata is endemic to the tropical and sub tropical areas of Africa s east coast Kenya , Malawi , Mozambique , South Africa , Swaziland , Tanzania , and Zimbabwe . The frog thrives in varying terrain including shrubland, grassland, savannah, and forest as long as there exists a ready source of fresh water or high humidity. Behavior Red legged running frogs are nocturnal, and therefore somewhat elusive to humans preferring to burrow under loose soil or hide in dense vegetation during the day. At night they take to climbing trees and tall shrubs to feed mainly on a diet of insects and insect larvae. As Pets Because they are nocturnal and do require a significantly moist environment 80 relative humidity is recommended , they are not as common a pet as other species of frog. However, being rather hardy and robust, they do survive well under appropriate basic conditions. A source of UV light is not required, and ambient temperature of 72 to 77 F 22 to 25 C is sufficient. Both a thermometer and hygrometer should be present. Moss or coconut fiber should be used as substrate for burrowing, with both wet and dry ground areas within the enclosure. A basin or bowl of clean, fr ... more details
The SCR 658 radar was developed in conjunction with the SCR 268 radar . It was preceded by the SCR 258. Its primary purpose was to track weather balloons. Prior to this it was only possible to track weather balloons with a theodolite , causing difficulty with visual tracking in poor weather conditions. The set is small enough to be portable and carried in a Ben Hur trailer . File SCR 658 radar.JPG 200px thumb SCR 658 Surviving Examples there is one Known survivor at the Air Force museum in Dayton Ohio http www.nationalmuseum.af.mil photos index.asp?galleryID 4881 See also Signal Corps Radio SCR 268 radar Radiosonde RAWIN References TM 11 1158 TM 11 2409 mobile Meteorological station Air Defense Artillery Journal March April 1949 http www.airdefenseartillery.com online 2010 Antiaircraft 20Command 201946 Antiaircraft 20Journal 1949 20Screen Mar Apr 201949 20 Screen .pdf External links http www.photolib.noaa.gov htmls wea01200.htm http www.gordon.army.mil ocos museum equipment.asp SCR and BC lists http 6thweathermobile.org 1949 part 201 .htm excellent pics. http www.srh.noaa.gov ssd tstm html tstorm.htm US wx radar Navbox name Meteorological equipment title Earth based meteorological equipment and instrumentation list1 nowrap begin Anemometer w Barograph w Barometer w Ceiling balloon w Ceiling projector w Ceilometer w Dark adaptor goggles w Disdrometer w Field mill w Hygrometer w Ice Accretion Indicator w LIDAR w Lightning detector w Nephelometer w Nephoscope w Pan evaporation w Pyranometer w Radiosonde w Rain gauge w Snow gauge w SODAR w Solarimeter w Sounding rocket w Stevenson screen w Sunshine recorders w Thermograph w Thermometer w Weather balloon w Weather radar w Weather vane w Windsock w Wind profiler nowrap end noinclude DEFAULTSORT Scr 658 Radar Category Meteorological instrumentation and equipment Category Military radio systems Category World War II electronics Category World War II American electronics Category Weather radars Category Military electronics ... more details
File Honeywell brown.jpg thumb Abandoned Brown Instrument factory near Fern Rock Transportation Center , Philadelphia, Pennsylvania , in 2011. Note faded Honeywell Brown Instrument Division sign. coord 40 01 17 N 75 09 34 W display title Brown Instrument Company was a United States U.S. firm known for high quality Measuring instrument instruments such as pyrometer s, thermometer s, hygrometer s, tachometer s, Pressure measurement pressure gauge s, Flow measurement flow meter s, and electrical meters and industrial controls. The company was founded in 1857 in Philadelphia by Edward Brown, inventor of the first pyrometer of American design. ref Harvnb Licht 1992 pp 161 162 . ref In 1934, the firm became a division of Honeywell . The company was a large employer in North Philadelphia during most of the 20th century. A large brick factory building across Windrim Avenue from Wayne Junction SEPTA station Wayne Junction , currently Extra Space Storage, was a principal Brown Instrument Company building. A 1921 catalog ref Harvnb ASME 1921 p 292 . ref mentions laboratories here. The Wayne Avenue fa ade still has Brown Instrument Co relieved into the concrete. A Google Book search for Brown Instrument Wayne Ave shows multiple addresses for the company on the 4400 and 4500 blocks of Wayne Ave, which straddle Wayne Junction. Another search result from 1915 mentions 311 Walnut St. Across the regional rail tracks from Fern Rock Transportation Center there is another old factory building topped by a sign marked Honeywell Brown Instrument Division . The firm later moved to Fort Washington, Pennsylvania . Honeywell s automation and control businesses still have a campus there, although the Brown Instrument name has been retired. Image gallery gallery File HoneywellBrown2.jpg Brown Instrument factory near Wayne Junction , Philadelphia, Pennsylvania , in 2011, repurposed as a self storage company. File Brown instrument Company Building.jpg Wayne Avenue fa ade with relief of The Brown ... more details
experiments on moisture, evaporation and the indications of hygrometer s and thermometer s, applied ... his account of a new hygrometer, which resembled a mercurial thermometer, with an ivory bulb, which ... more details
Infobox television show name 100 Biggest Weather Moments image Image 100 Biggest Weather Moments.jpg caption 100 Biggest Weather Moments title screen format Documentary film Documentary runtime approx. 1 hour per episode creator executive producer starring Host br Harry Connick, Jr. br Other br Various celebrity commentaries, br The Weather Channel s on air meteorologists country USA network The Weather Channel United States The Weather Channel first aired April 15, 2007 last aired April 19, 2007 num episodes 5 website http www.weather.com aboutus television 100biggest 100 Biggest Weather Moments is a 2007 in television 2007 five part miniseries on The Weather Channel United States The Weather Channel , that premiere d on April 15 and aired nightly through Thursday, April 19, and is the biggest documentary film documentary effort in The Weather Channel s 25 year history. ref http home.businesswire.com portal site google index.jsp?ndmViewId news view&newsId 20070419005069&newsLang en The Weather Channel Unveils Number One Weather Moment Global Warming , Business Wire , April 19, 2007 ref The series is TV host host ed by Harry Connick, Jr. and countdown counts down the top weather related events with commentary from various celebrities. The collection of weather moments is the work of more than 120 meteorologists. ref http nab.broadcastnewsroom.com articles viewarticle.jsp?id 125329 Big Moments In Forecast BroadcastNewsroom Bot generated title ref Episode Details class wikitable Ep. Moment Original Air Date Ep. length 1 100 78 April 15, 2007 rowspan 9 1 hour 2 77 56 April 16, 2007 3 55 34 April 17, 2007 4 33 13 April 18, 2007 5 12 1 April 19, 2007 Weather Moments div style float left width 48 Episode 1 100. The Snow Plow Game http www.weather.com aboutus television 100biggest 99. Stradivarius Stradivarius violins 98. Great Flood of 1993 1993 Midwest Flooding 97. William Henry Harrison Blowing in the wind 96. Sunglasses 95. Hygrometer The hygrometer 94. Judgment of Par ... more details
Image Umidaderelativa.jpg thumb A hygrometer is a device used for measuring the humidity of air. Relative humidity is a term used to describe the amount of water vapor in a mixture of air and water vapor. It is defined as the ratio of the partial pressure of water vapor in the air water mixture to the saturated vapor pressure of water at the prescribed temperature. The relative humidity of air depends not only on temperature but also on the pressure of the system of interest. Relative humidity is often used instead of absolute humidity in situations where the rate of water evaporation is important, as it takes into account the variation in saturated vapor pressure. Definition The relative humidity math left phi right math of an air water mixture is defined as the ratio of the partial pressure of water vapor H sub 2 sub O math left e w right math in the mixture to the saturated vapor pressure of water math left e w right math at a prescribed temperature. Relative humidity is normally expressed as a percentage and is calculated by using the following equation ref name Perry Perry, R.H. and Green, D.W, Perry s Chemical Engineers Handbook 7th Edition , McGraw Hill , ISBN 0 07 049841 5 , Eqn 12 7 ref math phi e w over e w times 100 math Measurement The humidity of an air water vapor mixture is determined through the use of psychrometric charts if both the Dry bulb temperature dry bulb temperature T and the Wet bulb temperature wet bulb temperature T sub w sub of the mixture are known. These quantities are readily estimated by using a sling hygrometer psychrometer . There are several empirical correlations that can be used to estimate the saturated vapor pressure of water vapor as a function of temperature. The Antoine equation is among the least complex of these formulas, having ... used to measure humidity is called a hygrometer one used to regulate it is called a humidistat ... indicator Humidity indicator card Hygrometer Psychrometrics Saturation vapor density water activity ... more details
Infobox Person name John Frederic Daniell image Daniell chemist b.jpg caption British chemist & physicist quotation unknown birth date birth date 1790 3 12 df y birth place London , England dead dead death date death date and age 1845 3 13 1790 3 12 df y death place London , England John Frederic Daniell 12 March 1790 &ndash 13 March 1845 was an England English chemist and physicist . Daniell was born in London , and in 1831 became the first professor of chemistry at the newly founded King s College London . His name is best known for his invention of the Daniell cell Philosophical Transactions of the Royal Society Phil. Trans. , 1836 , an Battery electricity electric battery much better than voltaic cell s. He also invented the dew point hygrometer known by his name Quar. Journ. Sci. , 1820 , and a register pyrometer Phil. Trans. , 1830 and in 1830 he erected in the hall of the Royal Society a water barometer , with which he carried out a large number of observations Phil. Trans. , 1832 . A process devised by him for the manufacture of illuminating gas from turpentine and resin was in use in New York for a time. His publications include Meteorological Essays 1823 , an Essay on Artificial Climate considered in its Applications to Horticulture 1824 , which showed the necessity of a humid atmosphere in hothouses devoted to tropical plants, and an Introduction to the Study of Chemical Philosophy 1839 . Daniell died suddenly of apoplexy in London, while attending a meeting of the council of the Royal Society, of which he became a fellow in 1813 and foreign secretary in 1839. The lunar crater Daniell crater Daniell is named in his honour. See also Timeline of hydrogen technologies References cite DNB wstitle Daniell, John Frederic volume 14 year 1888 page 33 Attribution 1911 Copley Medallists 1801 1850 Authority control PND 116023325 LCCN n 85 800769 VIAF 15509252 Persondata Metadata see Wikipedia Persondata . NAME Daniell, John Frederic ALTERNATIVE NAMES SHORT DESCRIPTI ... more details
Goldbeater s skin the outer membrane of calf s intestine is a parchment traditionally used in the process of making gold leaf by beating, reducing gold into mere 1 m thick leaves. Up to 120 sheets of gold laminated with goldbeater s skin can be beaten at the same time, since the skin is thin, elastic and does not tear under heavy goldbeating . To manufacture goldbeater s skin, the gut of oxen or other cattle is soaked in a dilute solution of potassium hydroxide , washed, stretched, beaten flat and thin, and treated chemically to prevent putrefaction . A pack of 1,000 pieces of goldbeater s skin requires the gut of about 400 oxen, and is only 1 inch thick. Uses Goldbeater s skin is used as the sensitive element in hygrometer s, since, due to its hygroscopy hygroscopic property, variations in atmospheric humidity cause skin contraction or expansion. Alexander Graham Bell used a drum of goldbeater s skin with an armature of magnetised iron attached to its middle as a sound receiver see Invention of the telephone and the North German Confederation printed 10 and 30 groschen postage stamp s on goldbeater s skin, to prevent reuse of these high value stamps. Joseph Thomas Clover invented an apparatus for the inhalation of chloroform in 1862 which consisted of a large reservoir bag lined with goldbeater s skin to make it airtight, into which a known volume of liquid chloroform was injected. ref Sykes WS 1960 . Essays on the First Hundred Years of Anaesthesia , Vol. 2, Churchill Livingstone, Edinburgh. ISBN 0 443 02866 4, p. 8. ref Due to its transparency, strength, and fairly uniform thickness, goldbeater s skin is also used to repair holes and tears in manuscripts written on vellum . In the early 1900s decade 1900s large quantities of goldbeater s skin were used to make the gas bags of rigid airship s, exhausting the available supply about 200,000 sheets were used for a typical World War I Zeppelin , while the USS Shenandoah ZR 1 USS Shenandoah needed 750,000 sheets. ... more details
Encyclopedia
top
