﻿382 Proceedings. 



The Hon. Mr. Man tell said he had noticed that a tub of muddy well water 

 was always cleared by the rain-water running into it from the roof of his house. 



Captain' Hutton i-emarked that chlorophyll presents an analogous case to 

 clay. It is suspended in water, but precipitated by some salts such as proto- 

 chloride of tin. 



4. " On a Form of Electro-magnetic Seismograph, adapted for indicating 

 and registering Minute Shocks," by W. Skey. (See Transactions, p. 330.) 



5. " On a New Process for the Manufacture of Sulpho-cyanide of Potas- 

 sium," by W. Skey. (See Transactions, p. 330.) 



6. " On the Absorption of Copper from its Ammoniacal Solution by 

 Cellulose, in the presence of Caustic Potash," by W. Skey. (See Transactions, 

 p. 332.) 



7. Dr. Knox presented some further dissections of New Zealand Bats, and 

 read some descriptive notes. 



The Chairman drew attention to the skilful manner in which these delicate 

 preparations had been made, and stated that the Museum is indebted to Dr. 

 Knox for a large number of similar preparations which require a gi'eat amount 

 of accurate knowledge and long practice for their production. 



