384 



MANIPULATION. 



with in all kinds of stagnant and putrid water, whilst the more 

 highly organized are only to be found in clear ponds and in 

 streams where they attach themselves to the stems and under 

 sides of the leaves of aquatic plants, or even to small pieces 

 of wood or other vegetable matters that are either floating or 

 kept beneath the surface of the water. Some kinds are 

 found near the surface, others in the mud at the bottom, all of 

 which localities should be carefully searched. 



Apparatus. — For the purpose of collecting these interesting 

 creatures, the following simple apparatus will be required, 

 viz., some clear wide-mouthed phials or tubes capable of being 

 well corked, a walking-stick or jointed rod, provided with a 

 ring at the end for holding the phials, a small aquatic net of 

 muslin strained upon a hoop of wire, and a pocket magnifier. 

 Fig. 252 represents the various instruments that will be found 

 necessary ; at a two joints of a fish- 

 ing-rod of cane are shown, the top 

 joint, for convenience of package, 

 being made to slide within the lower 

 one ; to the upper end, b, is screwed 

 a steel ring of the shape represented 

 by 'b, for the purpose of holding the 

 phial as seen at c; into the same 

 handle may be fitted the hoop, d, 

 having a bag of fine muslin attached 

 to it ; this may be of the shape there 

 shown, or brought to a fine point. 

 In the absence of this apparatus, a 

 stick, as exhibited at e, having a split 

 at one end, may be employed ; into 

 this the neck of the phial, /, is to be 

 placed and kept firmly fixed by wind- 

 ing a string round it, as shown at g. 

 Mr. George Shadbolt, who has paid 

 some considerable attention to these 

 matters, has lately recommended to 

 the author the following plan of 

 Fig. 252. securing the phial to the stick, which 



