A manual of dyeing: for the use of practical dyers, manufacturers, students, and all interested in the art of dyeing (1919)
Knecht, Edmund, 1861-1925, Loewenthal, Richard, Rawson, Christopher · London : C. Griffin · leaf 529
by reference to tables. This, however, is seldom done inthe works, the difference in the temperatures of the two thermometers being a sufficientguide to work by. Another instrument for measuring the moisture in the atmosphere is the hair-hygrometer,the action of which depends upon the fact that a… … Fig. 121.—Hottingers hair-hygrometer. It contains a well cleansed hair, made fast at its upper end, while the lower end passesround a small pulley, to which is attached a finger. 1 he hair is kept stretched by meansof a weight of half a gramme attached to its lower extremity. When drying, the…
Dyes and dyeing
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
