MEMORANDA. 205 



form a ring, a, while attached to it is a small socket of the 

 same material, b, in which the rod or walking-stick is in- 



serted, as shown in drawing No. 2. A stopper or cork, also 

 of gutta percha, c, formed so as to admit of its easy with- 

 drawal when the bottle is in use, is fixed to the socket by 

 a piece of string of adequate length. 



The bottle, when used for collecting, is fitted to the rod or 

 stick, as shown in drawing No. 2, and the stopper inserted in 



No. 2. 



its mouth, while the string is held on a finger of the hand 

 carrying the stick. The bottle may then be plunged in the 

 water, in any position most convenient, and guided to the 

 place from which the sample is required, when a slight pull 

 at the string removes the stopper, allows the water to enter, 

 carrying with it any small insects, &c, that may be near the 

 vol. VIII. R 



