Inside Out Library · Explore

Scientific American, Vol. 54, No. 15 (1886) (1886)

leaf 4

An illustration from Scientific American, Vol. 54, No. 15 (1886), 1886, leaf 4
key hole. The importance of having efficient means at com- Doors provided with them may be opened from either mand when an epidemic of contagious disorders breaks side, the ‘‘Open Sesame” being a knowledge of the out in a populous place has been so abundantly proved combination of figures by which… … INSIDE LATCH OF CHAMPION DOOR LOCK. CHAMPION FLUSH DIAL CHEST LOCK. would be impossible. The beveled form of thenum- bered dial is considered preferable for a great many the best disinfectant. It has been found by high scien- were thin and delicate; it isnot the rule now. South- purposes, but these…

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 54, No. 15 (1886)

More like this