Periodicals; Chemical industry; Explosives; Dynamite; Firearms industry; Automobile industry; Farming;
Table of Contents: American dyestuffs industry, 1922 and 1923; Automobile trunk arrives; Tree planting after ten years; Protective coatings for iron and steel; Dynamite for choker holes; Blasting riprap economically.
Periodicals; Chemical industry; Explosives; Dynamite; Plastics industry; Ammunition;
Table of Contents: What of the new year; Five tons of rock per pound of explosives; More economy in secondary shooting; Whence American dyes; A new way of looking at soap; Dynamite breaks into the movies; Explosives in the lumber industry; DuPont...