Glass is silvered, by Ar preading mercury over tin-foil : when they are united, a plate of glass is slid over to sweep off the superfluous metal. Weights are laid ... Hollow Glass Globes are silvered by one part of bismuth, one half of lead a fhe same of pure tin, and two parts of mercury. The solids ... As soon as the gold is dissolved, the mixture is poured into cold water, and it is then ready for use. The metal toanbsp;...
|Title||:||A manual of mineralogy|