. Fresh-water biology. Freshwater biology. 8o4 FRESH-WATER BIOLOGY This may be made out of a common pint fruit jar, by inserting a funnel through one side of the cover for pouring in the catch, and so arranged that the excess water may run off through an overflow tube, after passing through a cloth strainer made of the same material as the dip net, and which is distended and held in place by two narrow wire loops soldered to the inner end of the overflow tube. The strainer cloth is made in the form of a bag nearly as long as the depth of the jar, with its upper end held in contact with the inn
. Fresh-water biology. Freshwater biology. 8o4 FRESH-WATER BIOLOGY This may be made out of a common pint fruit jar, by inserting a funnel through one side of the cover for pouring in the catch, and so arranged that the excess water may run off through an overflow tube, after passing through a cloth strainer made of the same material as the dip net, and which is distended and held in place by two narrow wire loops soldered to the inner end of the overflow tube. The strainer cloth is made in the form of a bag nearly as long as the depth of the jar, with its upper end held in contact with the inner end of the overflow tube by a couple of rubber bands. In many cases it is recommended that the collected material be allowed to stand in a shallow vessel after F 12 8 D! m reaching the laboratory, when the creeping forms will fi)°Funnd'kitake- ^.ppear ou thc surface of the ooze and slime, and others (?) croth°st'rai'n''eri 'wiH coUcct about the edgcs of the vessel, commonly on the side nearest the source of light, or the opposite. If it is thought desirable, small portions of the ooze and slime may be examined under the low power of the compound micro- scope. Even the creeping Cyprididae are easier to find than the Cytheridae, such as Limnicythere, as they are more active and readily gather about the edges of any shallow vessel. No satisfactory work in identification can be accomplished in most cases until the body with its appendages is removed from the shell. It is not necessary to place the specimens in weak acid so as to decalcify the shell, as a little practice with dissecting needles and microscope will soon enable one to remove the parts from the shell without destroying them. After a preliminary examination, place the specimen in a small drop of Farrant's medium or in glycerin. The shell may now be opened with a pair of No. 12 needles, which are mounted in handles, or by the flexible probing needles used by dentists. Free the body from the shell entire, if possible
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfreshwa, bookyear1918
