WAX, BURNING, TRICK: See Pyrotechnics.
WAXES, DECOMPOSITION OF: See Oil.
WAX FOR IRONING: See Laundry Preparations.
WAX FOR LINOLEUM: See Linoleum.
WEATHER FORECASTERS
(See also Hygrometers and Hygroscopes.)
I.—It is known that a leaf of blotting paper or a strip of fabric made to change color according to the hygrometric state of the atmosphere has been employed for weather indications in place of a barometer. The following compound is recommended for this purpose: One part of cobalt chloride, 75 parts of nickel oxide, 20 parts of gelatin, and 200 parts of water. A strip of calico, soaked in this solution, will appear green in fine weather, but when moisture intervenes the color disappears. {757}
| II.— | Copper chloride | 1 part |
|---|---|---|
| Gelatin | 10 parts | |
| Water | 100 parts |
III.—This is a method of making old-fashioned weather glasses containing a liquid that clouds or solidifies under certain atmospheric conditions:
| Camphor | 2 1/2 drachms |
| Alcohol | 11 drachms |
| Water | 9 drachms |
| Saltpeter | 38 grains |
| Sal ammoniac | 38 grains |