File:Devices for use in fish hatcheries and aquaria (1910) (20865481706).jpg

Title: Devices for use in fish hatcheries and aquaria
Identifier: devicesforuseinf00vinc (find matches)
Year: 1910 (1910s)
Authors: (Vincent, Eugène) (from old catalog)
Subjects: Fish culture; Aquariums. (from old catalog)
Publisher: Washington, Govt. print, off.
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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1032 BULI^ETIN OF THE BUREAU OF FISHERIES. as dip nets and even shovels, for cleaning. This apparatus has proved most successful and obviates the necessity of putting the hands in cold water to do the work of picking the eggs. A CLEANING DEVICE FOR PONDS OR AQUARIA. The imperfect construction of some ponds, not permitting them to be entirely emptied, necessitates the use of various means and implements, such With even the greatest care it is difficult to maintain the clean- liness necessary to avoid mor- tality among the fish. The present device enables the fish culturist to prevent dis- ease by more thorough cleaning, and also by avoiding the bruises inflicted upon the fish in the course of the ordinary cleaning process if the water is muddy. It also prevents the disagreeable taste of fish reared in muddy and ill-cleaned ponds. The apparatus is constructed upon the principle of the fore- going rubber siphon and glass tube. Being for larger work, however, it is made of brass pipe with rubber or canvas connec- tions. It consists of a main arm terminating in an elbow joint which is expanded into a flat tri- angular cavity with an entrance valve. This valve, opening up- ward, is controlled by a lever at- tached by a cord to a trigger on the handle of the apparatus. The handle, which is of wood and inserted in the upper end of the main tube, may be of any desired length. Branching off the main tube a short distance below the handle is an arm for connection with the discharge pipe. In operation the discharge arm may be attached to rubber or canvas hose, with outlet below the level in the pond or tank, and the apparatus guided about over the bottom by means of the handle, the suction being regulated by the cord attached to the valve. In cases where the pond may not be emptied.
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Fig. 4.—Cleaning device for ponds and aquaria

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