- sides of the box can be raised by cranks to admit the aging it? Krauz recommends exposure to high-pres- cites the case of twenty clerks of the health depart- book racks. In the center of the oven is a vessel ment of Lansing, Mich., who became victims of tuber- sure steam for 40 minutes. The… … Fig. 1.—Sliding the rack of books into the disinfecting oven. Fig. 8.—The beating machine, which frees the books from dust. THE DISINFECTION OF SCHOOL BOOKS.
Supplement · Curtiss · Concrete · Newcomb · Machine · American supplement · Scientific American · Rapid transit · Float chamber · American supplements · Variable numbers · Fourth dimension · Seedless dates · Siphon tube · Three dimensions
Internet Archive · Public domain (published before 1931). Free to use for anything.
