6 
Wednesday, January 15th, 1868.— Mr. W. L. Carpenter, President 
in the chair. 
The minutes of the last meeting were approved. Mr Charles Hill and 
Mr. William Budgett, were balloted for and elected members. 
Dr. Henny Fripp read a paper on the anatomy of the eye of Pterocera 
(pectinibranchiate mollusc. ) 
Wednesday, March 18th, 1868.— Mr. W. L. Carpenter, President, 
in the chair. 
The minutes of the last meeting were approved. Dr. Beddoe and The Bev. 
W. Dallenger, were proposed as members to be ballotted for at the next 
meeting. Mr. Balph Bernard was re-elected as a member. 
Mr. E. A. Praeger read a paper on human teeth, in health and decay. 
Wednesday, April 22nd, 1868.— Dr. C. T. Hudson, in the chair. 
The minutes of the last meeting were approved, Dr. Beddoe and The Bev. 
W. Dallenger, were ballotted for and duly elected members. Mr. Keall 
was proposed as a member to be ballotted for at the next meeting. 
Dr. Herapath made a short communication on the recent case of poison- 
ing by oxalic acid. 
Mr. F. Martin gave a few notes on Thallium and its salts as objects for 
the polariscope. He remarked that Thallium was discovered by Mr. Crookes, 
by means of Spectrum Analysis, its presence being indicated by a bright 
green band in the Spectrum-Metallic Thallium, closely resembles lead in its 
