COLLECTING BOTTLE AND NET. 



193 



and chemists for pomade ; this is exactly adapted 

 to fit into the screw of the hrass ring. The facilities 



A. Trough for showing circulation in fish-tail. 



B. Collecting bottle and stick. 



afforded "by such an arrangement are ohvions enough ; 

 broken bottles can be readily replaced at a small cost, 

 and each bottle when filled corked up and replaced by 

 another. A small fine-gauze net and a hook is made to 

 screw into the same stock ; the whole packs into a very 

 small compass. 



Fig. 118.— Collecting Net. 



Collecting Animalcules. — For collecting fresh water or 

 marine animals, the small net, made similar to a landing- 

 net, fig. 118, will be found useful : this should be securely 

 fastened to the brass ring a, and fitted firmly into the 

 socket b ; when not in use, the socket may be carried in 

 the pocket ; and the net, by contracting the diameter of 

 the ring (which the construction admits of) may be carried 

 inside the hat. 



For collecting desmids, diatoms, and other small crea- 

 tures, Mr. Williamson has a cheap and simple contrivance 

 for converting the end of a walking-stick or umbrella into 

 what he terms a "collecting-stick." In fig. 119, a repre- 



