St. Nicholas (serial) (1873) (14598321548)

Identifier: stnicholasserial392dodg (find matches)
Title: St. Nicholas (serial)
Year: 1873 (1870s)
Authors: Dodge, Mary Mapes, 1830-1905
Subjects: Children's literature
Publisher: (New York : Scribner & Co.)
Contributing Library: Information and Library Science Library, University of North Carolina at Chapel Hill
Digitizing Sponsor: University of North Carolina at Chapel Hill



Text Appearing Before Image:
CONNECTING TWO AQUARIA BYSELF-ACTING SIPHON. arm started the flow, which continued as long asthere was any water to pull and to be pulled. Itrequired little force to pull the water around thecurve by suction at the end of the lower pipe. I0T2.) NATURE AND SCIENCE FOR YOUNG FOLKS 845
Text Appearing After Image:
THE WATER RISKS SEVERAL FEET FROM THE HIGHERTUMBLER, THEN FLOWS ACROSS ABOVE THE BOYSHEAD, AND DOWN TO THE LOWER TUMBLER.The current may be reversed by putting the two-inch block under the other tumbler. Siphons are used to draw off the liquid from avessel containing it, especially where there is sedi-ment at the bottom and we desire to take off theclear liquid without disturbing the sediment; orthe reverse may be done, and we may remove thesediment with little of the liquid. Thus the siphonmay be employed to remove the objectionable refuse or debris from an aquarium, or for manyother useful purposes. I recently had occasion to connect together aseries of aquaria, each with a glass bottom. Itwas impossible for me to bore holes in the glass,so I was necessarily forced to use the siphon ; but adifficulty arose. If the siphon should fail to carryout the water as fast as it ran in, the aquariawould overflow; and if it should carry the waterout faster than it came in, the aquaria would soo