Another class of projects illustrate the caviler [sic] attitude toward environment and health in 1913. These projects involve items such as gunpowder, acetylene, hydrogen, lead, mercury, sulfuric acid, nitric acid, cadmium, potassium sulfate, potassium cyanide, potassium ferrocyanide, copper sulfate, and hydrochloric acid. Several involve the construction of hazardous electrical devices. Please view these as snapshots of culture and attitude, not as suggestions for contemporary activity.
Still, there are also some very fun and potentially useful projects, including a secret door lock, an igloo, kites and boomerangs, your own backyard merry-go-round, scores of sleight-of-hand magic tricks, a toboggan, and a homemade butter churn, about which the contributor says: