( 10 ) 
THE REFERENCE BOOK FOR MICROSCOPISTS 
Fourth Edition. Illustrated by 53 Plates and numerous Woodcuts, giving figures of 
nearly 3000 objects, Medium 8vo, £2 12s. 6d, 
GRIFFITH AND HENFREY’S 
MICROGRAPHIC DICTIONARY. 
A Guide to the Examination and Investigation of the Structure and Nature of 
Microscopic Objects. Edited by J. W. Griffith, M.D., &c. ; assisted by the Rev. 
M. J. Berkeley, M.A., F.R.S., F.L.S., and T. Rupert Jones, F.R.S., F.G.S., Professor of 
Geology, Sandhurst, &c. 
GfTJItNEX & JACKSON 
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CONDENSERS, &c. 
New Homogeneous Immersion Objectives . 
T \in. N.A. 1-28 .. .. £8. J- in. N.A. 1*27 .. .. £12. ^ in. N. A. 1 • 26 .. .. £15. 
Correction Collar to either of the above, £1 10s. extra. 
NEW SERIES OF APOCHROMATIC OBJECTIVES. 
Pry Achromatic Condenser 
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Vienna, VIII. Bennogasse SO, 
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= FIRST-CLASS = 
Microscopes and Objectiyes, 
NEW SEMIAP0CHR0MATICS. 
Catalogues and Price Lists in English, French, Italian, and German. 
THE BRITISH MOSS FLORA. 
By B. BRAITHWAITE, M.D. 
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Author. Vol. I., price £2 10«., is published by 
LOVELL BEEVE & 00., 5, HENRIETTA STBEET, C0VENT GABDEN. 
£8 8 0 
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