American journal of physiology . Figure 2.—Cypris virens Jurine. X antenna; atl. antennule ; ^ firstfoot. Reaction of Entomostraca to Stimulatio7i by Light. 407 By means of Birges (i 881-91, pp. 397-398)^ Cone Dredge it waspossible in a few minutes to collect thousands of the animals. I wishto take this opportunity to call at-tention to Birges ingenious device,because it is very convenient forthis kind of workand a valuable timesaver. The appara-tus, of which Fig. 3is a sketch, consistsof a wire cone oftwo- millimetre mesh, C, through which the animals to be collectedmay easily pass
American journal of physiology . Figure 2.—Cypris virens Jurine. X antenna; atl. antennule ; ^ firstfoot. Reaction of Entomostraca to Stimulatio7i by Light. 407 By means of Birges (i 881-91, pp. 397-398)^ Cone Dredge it waspossible in a few minutes to collect thousands of the animals. I wishto take this opportunity to call at-tention to Birges ingenious device,because it is very convenient forthis kind of workand a valuable timesaver. The appara-tus, of which Fig. 3is a sketch, consistsof a wire cone oftwo- millimetre mesh, C, through which the animals to be collectedmay easily pass. To opposite sides of this coneis soldered a strong wire, which is bent into aring, R, at the apex of the cone for the attach-ment of a cord with which to draw the dredgethrough the water. The base of the wire coneis soldered to a metal band, to which is fastenedone end of a fine cloth net, N. The other andnarrower end of the net is fastened to a metalflange which carries a screw cap, S. As the dredgeis drawn through the wate
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Keywords: ., bookautho, bookcentury1800, bookdecade1890, booksubjectphysiology
