Important: Safety Warning
This page describes practices involving highly flammable materials in ways that create a serious risk of fire or explosion.
In addition, this page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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Elastic Cement
Dissolve 1 which admitted dust and a current of cold air will be closed so tightly that no window strips will be required. The buttons should be placed about half way between the uppe and lower end of cach sash. 6396. To Detect a Counterfeit Bank of England Note. The Bank of England possesses no security which may not be know I by any person who will make himself acquainted with the following characteristics of the paper, the plate printing and the type printdrachm gutta-percha in 1 ounce or more bisulphide of carbon, so as to make a fluid that will easily pass through coarse filtering paper.
After filtering, add about 15 grains pure indiarubber, and let it dissolve; or, when it has become soft and gelatinous, quickly rub the whole smooth with a palette knife on a slab.