FOR FIRE EXTINGUISHING AND FIREPROOFING.
A simple fire extinguisher can be made at very little cost. If twenty pounds of common salt and ten pounds of sal-ammoniac are dissolved in seven gallons of water, and the mixture afterwards put into quart bottles of thin glass, the grenades so made will be found to be very efficient for extinguishing small outbreaks of fire. The bottles should be tightly corked and sealed, so as to prevent evaporation, and, when a fire occurs, they must be thrown in, or near the flames, so as to break and thus liberate the gas contained to effect the desired object.
The following silification process to render wood waterproof and fireprooi is a simple one. First, lay the small boards into a waterglass solution of from five to ten degrees Be.; leave them there from ten to twelve hours; then take them out and allow them to drip off. When dry, place them in a solution (gravity two to three degrees Be.) of calcium chloride, magnesium chloride, and ammonium chloride; leave them in it for from four to six hours; take them outand let them drip off. When dry, they are waterproof and fireproof.