, for the protection of large iron structures from this ef- the Findlay Machine and Boiler Works, Findlay, fect, it might be advisable to place a large ball of zinc Ohio. in wet ground in metallic contact with the iron of the structure by means of wires, which he believes would A WIDOW SASH… … that it is the cause of both cowpox and smallpox. KIRSCH'S WINDOW SASH FASTENER. A Home for Truants. and bottom, and is very simple, durable and inexpen- Boston is soon tohave a home school fortruants and sive, and capable of quick and easy manipulation. It troublesome boys. They are to be gathered…
Microbes · Chemical · Scientific American · Munn · Hot air · Foul air · Perspective views · Bowling alley · Electric motor · Piston valve · Chemical action · Eyes open · Dozen perfection
Internet Archive · Public domain (published before 1931). Free to use for anything.