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The tuberculin test consists of the introduction into the skin , usually by injection
on the front surface of the forearm , of a minute amount of tuberculin . When the
test is positive , a swelling , usually accompanied by redness , occurs within 48 ...
The scale is usually selected to be some convenient multiple or fraction of full
size , such as full size , half size , quarter size , one - tenth size , double size , or
ten times full size , although any intermediate scale may be used . Dimensions .
Ferricrust Information good : crust covers 10 % and upwards of area marked
Information poor and / or crust covers < 10 % and usually < 5 % of area silcrust
silitic SiO2 siallitic SiO2 , Al2O3 / A1203.2H2O silcrust / ferricrust fersilitic Fe2O3 ,
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LibraryThing ReviewUser Review - keylawk - LibraryThing
This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review