File:A manual of fish-culture, based on the methods of the United States commission of fish and fisheries (1897) (14761094531).jpg

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Identifier: manualoffishcult00unit (find matches)
Title: A manual of fish-culture, based on the methods of the United States commission of fish and fisheries
Year: 1897 (1890s)
Authors: United States. Bureau of Fisheries Brice, John J. (from old catalog) Moore, H. F. (Henry Frank), 1867-1948 Chamberlain, F. M. (Frederick M.)
Subjects: Fish culture Oyster culture Frogs
Publisher: Washington, Govt. print. off.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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LONGITUDINAL SECTION OF HATCHING TROUGH.SHOWNG POSITION OF HATCHING TRAYS, DAM, ETC. Hatching-troughs, Guard-screen, etc.Hatching-trays (0), made about twice as long as wide, i. e., 28 by13^, are convenient to handle and adjust in the troughs. The sidesof the frame are made of good pine lumber, dressed, 1 inch square;the ends are dressed \ by 1 inch, and are cut into the sides to form asmooth surface on the bottom for the wire filling. The wire used onthe trays is woven with 8 threads to the inch, with a mesh § inch long,and should be. well galvanized after it is woven, in order to preventrusting at the laps. Report U. S. F. C. 1 897. (To face page 79.) Plate 24.
Text Appearing After Image:
MANUAL OF FISH-CULTURE. 79 Four hatching-trays are placed in each trough and are secured bykeys or wedges:, and should be from 1 to 2 inches lower at the end nextto the head of the trough, as shown at D, D, D, D, page 78. If placedin this way, e^ch tray will hold from 12,000 to 15,000 eggs with safety.Muddy water during the hatching season necessitates the use of a tintray with a perforated bottom (shown at E, page 78), which is 13§ incheswide and 32 inches long. This sets inside of the hatching-trough onfeet raising it an inch above the bottom of the trough. The hatching-tray containing the eggs is placed inside and rests on the bracketsshown at G. The fish, as they hatch out, fall from the hatching-trayupon the perforated bottom of the tin tray, and by their movementswork the sediment through, leaving them on a clean bottom and in nodanger of being smothered. The tin trays are also useful in countingfish, or in holding small lots of fish of different species in the sametrough. Wher

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United States. Bureau of Fisheries; Brice, John J. [from old catalog]; Moore, H. F. (Henry Frank), 1867-1948;

Chamberlain, F. M. (Frederick M.)
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28 July 2014
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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14761094531. It was reviewed on 11 October 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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current15:02, 11 October 2015Thumbnail for version as of 15:02, 11 October 20152,896 × 1,794 (1.78 MB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
11:37, 11 October 2015Thumbnail for version as of 11:37, 11 October 20151,794 × 2,898 (1.79 MB)Fæ (talk | contribs)== {{int:filedesc}} == {{information |description={{en|1=<br> '''Identifier''': manualoffishcult00unit ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Fmanualoffishcult00unit%2F fin...

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