CĂRȚI ÎN ENGLEZĂ ÎN LEGĂTURĂ CU «WATCH-GLASS»
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1
Transactions of the Royal Society of Edinburgh
In re-forming the original film, as above described, the wine-glass may be held
either horizontally, vertically, or even inverted entirely with the watch-glass held
beneath it. (3.) If, after forming the concave film, as in the first experiment, we
raise ...
Over the beaker place the watch glass containing tap water and set the
experiment as shown in the figure. Heat the contents of the beaker, the water
starts boiling, the steam produced evaporates the water in the watch glass slowly.
Continue ...
3
Chemistry in the Laboratory
Because stearic acid is one of the fatty acids present in soaps, you must not clean
your watch glass with soap. Any soap, grease, or dirt present can form a film on
the water that prevents the stearic acid from spreading on the surface, leading to
...
James M. Postma, Julian L. Robert, J. Leland Hollenberg,
2004
4
Safety-Scale Laboratory Experiments for Chemistry for Today
While the solid is dissolving, weigh a clean, dry watch glass on the same balance
you used in Steps 2 and 3. The watch glass should have a diameter large
enough to allow it to cover the mouth of the beaker used to make your boiling—
water ...
Spencer Seager, Michael Slabaugh,
2013
5
U.S. Geological Survey Circular
2. Place a 3-inch watch gla hard, light-colored surface. on a smooth, level, (2) A
light-colored background is helpful when removing particles from the watch glass
after swirling. 3. Place a small amount (5 ml) of the aqueous suspension in ...
2. Place a 3-inch watch glass on a smooth, level, hard, light-colored surface. 3.
Place a small amount (5 ml) of the aqueous suspension in watch glass. Allow to
settle for one minute. (2) A light-colored background is helpful when removing ...
7
Congressional serial set
EUROPE'S WATCH-GLASS TRUST. WHY THE UNITED STATES IS NOT
INDEPENDENT OF IT. Consul George Eugene Eager, of Barmen, Germany, in
answer to an inquiry from an American manufacturer why watch glasses are not ...
United States. Government Printing Office,
1907
8
Laboratory Apparatus and Reagents Selected for Laboratories ...
Watch Glass, with concave center and a small facet on the bottom; 45 mm
diameter. . . . . . . . . . . . . .10 9838. Watch Glasses, in Pairs, with edges accurately
ground together, for use with clamps. These are not to be confused with
counterpoised ...
Thomas, Arthur H., company, Philadelphia,
1921
9
Cyclopædia of the diseases of children
1, a small watch-glass, is nearly full of the aniline- waUT coloring mixture above
mentioned ; in No. 2, which should be a large watch-glass, is a considerable
quantity of dilute nitric acid (1 to 3) ; in No. 3, also a large watch-glass, is a ...
10
Distal Impact Ejecta Layers: A Record of Large Impacts in ...
We pour a small amount of the coarsest size fraction of a sample into a small (*8
cm diameter) watch glass. The watch glass is inside a small shallow pan so that if
we spill some of the sample, we can recover it. We use a watch glass because ...
Billy P. Glass, Bruce M. Simonson,
2012