( 10 ) 
Illustrated by Fifty-three Plates and more than Eight Hundred Woodcuts, giving 
figures of nearly 3000 Microscopic Objects. 8vo. Cloth. £2 12s. 6d. 
Griffith & Henfrey’s Micrographic Dictionary: 
A Guide to the Examination and Investigation op the Structure 
and Nature op Microscopic Objects. 
FOURTH EDITION. 
Edited by J. W. GRIFFITH, M D., &c., assisted by The Rev. M. J. BERKELEY, 
M.A., F.L.S., and T. RUPERT JONES, F.R.S., F.G.S., &c. 
“ A valuable handbook even for the advanced student of nature, to whom, moreover, the having such a 
vast mass ot scattered zoological and botanical knowledge brought together within the compass of a single 
volume cannot but be exceedingly convenient." — Annals of Natural History. 
LONDON: GURNEY & JACKSON, 1, PATERNOSTER ROW. 
(Successoks to Mr. VAN VOORST.) 
SWIFT & SON’S New 1/12 in. Homogeneous Immersion Objective of 
1*25 N.A., in which the New Abbe-Schott glass is used, price £5 5s. 
This lens Swift & Son guarantee to be equal to any other Homogeneous Immersion 
Objective of the same N.A. 
Swift & Son are continually receiving testimonials in praise of the above Objective. 
A New 1/12 in. Apochromatic Homogeneous Immersion Objective of 
1*4 N.A., £16. 
Compensating Eye-pieces, magnifying 10, 20, and 30 times, price 
each, £2. 
These Eye-pieces also give excellent results with Objectives made with the old Media. 
Projection Eye-pieces for Photo-Micrography, magnifying 3 and 
6 times, each £2. 
For ‘particulars of Professor Croolcshanh’ 8 Bacteriological Microscope, and Medical 
Press Comments , send for Circular . 
UNIVERSITY OPTICAL WORKS, 
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ROYAL MICROSCOPICAL SOCIETY. 
MEETINGS EOR 1892-3, at 8 p.m. 
Wednesday, October . . 19, 1892. 
„ November 16, „ 
}} V 30, 
( Conversazione at St. James's 
Hall Restaurant.) 
December 
January . 
21 , „ 
18, 1893. 
(. Annual Meeting for Election of 
Council and Officers.) 
Wednesday, February 
„ March 
„ Ajpril 
„ May . . 
,, June 
15, 1893. 
15, „ 
19, „ 
17 , „ 
21 , „ 
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