190 
@f tf)E ffiOUlUtl. 
JOSEPH BAXENDELL, F.R.A.S. 
JOHN PARRY. 
W. H. HEYS. 
W. C. WILLIAMSON, F.R.S., &c. 
J. G. LYNDE. 
J. WATSON. 
G. H. GRINDON. 
THOMAS COWARD. 
Donation. 
Dr. Alcock presented to the Section 24 slides of mounted 
Foraminifera from shore sand, coast of Galway. 
A fine stuffed specimen of Osprey, shot at Rostherne Mere, 
was exhibited by Mr. Harrison. 
PHOTOGRAPHIC SECTION. 
April 6th, 1865. 
H. E. Roscoe, B.A., Ph.D., F.R.S., F.C.S., Vice-Presi- 
dent of the Section, in the Chair. 
Mr. J. Sidebotham said that two of the chief points in his 
paper, read on the 2nd February, were, that lenses either 
very short or very long in focus did not give true transcripts 
of nature ; in the long focus the objects in the distance look- 
ing too near, and in the short focus too distant ; and that 
lenses of from seven to ten inches focus gave correct per- 
spective If large pictures were wanted they should be 
enlarged from negatives taken with a short focus lens. The • 
second point was, that in all photographs there should be 
introduced some standard of measure, so that the focus of the 
lens being known, objects could be approximately measured. 
Mr. J. B. Dancer remarked that in comparing pictures 
taken by short and long focal lenses for the purpose of show- 
