METHOD OF OBTAINING INFUSORIA, ETC. 



385 



Fig. 253. 



win be found worthy of a trial. A, fig. 253, is a piece of 



brass about three-eighths-of- 

 an-inch square, with two pro- 

 jecting pieces, a a, through 

 1^ one of which a screw with a 

 flat head works. One end 

 of the brass piece, c, is cylin- 

 drical, about half-an-inch in 

 diameter, with afemale screw, 

 d, into which a male screw 

 on the stick is made to work. 

 In one side of the brass. A, two screw-holes, e e, are made, 

 in order to attach permanently to it by screws the spring, B, 

 having two holes, ff, in it for the purpose. The phial being 

 placed in the loop, g, and the spring drawn close by pulling 

 the end, h, between the cheeks, a a, the flat-headed screw is 

 turned, and the phial firmly held. 



The spring may be made of steel, or of moderately thin 

 whalebone, which can be used in preference, as it will not 

 spoil by being wetted, and for the same reason the other part 

 may be made of brass. 



Since, however, Mr. Shadbolt obligingly furnished the 

 author with the above description, he has much simplified 

 the arrangement; the handle employed consists of two 

 joints of a fishing-rod, as shown at a, fig. 252; but, 

 instead of the upper ferrule being provided with a screw to 

 receive the ring, b, a piece of brass, having an oblong square 

 hole, 0, cut in it, is fastened into the ferrule, as shown in 

 fig. 254, A C ; through this the ends of a strip of whalebone 



are passed, and, according to the 

 /^^T'Nj. — -T^--- — -{— ^ — '- length inserted, the loop, r, may 

 ^^ — ^Sz . be made larger or smaller to re- 



ceive the neck of any kind of 

 phial, the screw, B, serving to 

 keep the whalebone firm, so that 

 the weight of water in the phial 

 may not draw the ends out of the 

 brass. For convenience of package, the whalebone is with- 

 25 



C 



c" 



Fig. 254. 



rz 



