Note 8 — HOME STUDIES IN CHEMISTRY AND PHYSICS.

Phosphoric acid is always produced by burning phosphorus in air or oxygen. The experiment may be performed as follows, but before undertaking it see page 167 of the “Chemistry,” and note with how much care it must be handled: Place a fragment of carefully dried phosphorus in a small cup on a stand in the middle of a large plate, ignite it by a hot wire, and place over it a bell-glass. White fumes will fill the glass and aggregate into small particles, which will fall to the plate, presenting the appearance of a miniature snow storm.