PROCEEDINGS OF THE SOCIETY. 
705 
had begun to divide within the mother-cell, also groups of 8 and 16 
young diatoms, which he inferred might have originated in a similar 
way. He thought these were imperfectly silieified. 
Votes of thanks were unanimously passed to Mr. Comber and 
Mr. Murray for their communications. 
Mr. F. Chapman read a further communication (the ninth of the 
present series) ‘ On the Foraminifera of the Gault.’ 
Prof. Bell said they would not receive with unbounded regret the 
announcement that Mr. Chapman’s next paper would be his last, because 
another Fellow of the Society had intimated his willingness to com- 
mence a fresh series as soon as Mr. Chapman had finished. One great 
point of interest to a philosophical mind was that the study of a 
subject like that under consideration seemed to lead to such extra- 
ordinary results. Sir Wyville Thompson, for instance, had told them 
that they were still living in the Cretaceous epoch. It struck him, how- 
over, as something remarkable that Mr. Chapman should tell them that 
Globigerina bulloides was so rare in the Chalk, because, so far as he knew, 
exactly the opposite was stated by every other writer. They would, no 
doubt, thank Mr. Chapman for this communication, but would reserve 
their serious thanks until the appearance of his tenth paper. 
Mr. E. M. Nelson gave a brief resume of his paper c On a Method of 
Measuring the Apertures of Objectives.’ 
The thanks of the Society were voted to Mr. Nelson for his paper. 
New Fellows. — The following gentlemen were elected Ordinary 
Fellows : — Mr. W. D. Colver and Dr. D. F. Gamber. 
The following Instruments, Objects, &c., were exhibited : — 
The Society : — 
Diploma and Medal awarded by the Columbian Exhibition at 
Chicago. 
Microscope believed to have been made by John Marshall about tho 
year 1700. 
Culpeper’s Compound Microscope, date about 1738. 
The first Patent Microscope, invented by George Lindsay in 1742. 
Three Microscopes made by Messrs. Culpeper and Scarlet about 
1750. 
Dellebarre’s “ Microscope Universel,” date about 1777. 
Microscope made by Benjamin Martin about the year 1780, formerly 
in the possession of the late Prof. John Quekett. 
Solar Microscope made by Messrs. Jones, date about 1790. 
Compound Microscope by Cary, date about 1800. 
