ROCKS, FOSSILS, MINERALS, 
BRITISH AND FOREIGN SHELLS, 
CBITSTACEA & ECHIUODEBMATA. 
Single Specimens Supplied, or Colledtions at One, Two, Three, Five Guineas, 
and upwards. 
GLASS-CAPPED BOXES, TRAYS, TABLETS, 
And every Geological Requisite. 
MICROSCOPIC OBJECTS 
FROM EVERY DEPARTMENT IN NATURE. 
THOMAS D. RUSSELL, 
48, ESSEX STREET, STRAND, LONDON, W.C. 
CATALOGUES FREE. 
IR,_ CHEFFINS., 
(Wlooi) (tnjjrater, glctjpital ani) Scientific Draughtsman, 
9, ESSEX STREET, STRAND, W.C. 
As Engraver to this and other Philosophical Periodicals, Mr. Cheffins begs 
to call attention to the fad that he possesses every appliance for the produc- 
tion of Illustrations to the works of Scientific Authors, as well as special 
facilities for the absolutely accurate reproduction of Diagrams, Microscopic 
Objects, &c., by Photography cn Wood ; by which process they can be either 
enlarged or reduced. 
Experienced Draughtsmen provided to attend Lectures and Demonstrations, 
and to Sketch Mechanical and other objects at a few ho urs’ notice . 
South London School of Pharmacy^ 
325, KENNINGTON ROAD. 
MANAGING DIRECTOR — DR. MUTER 
Daily Lectures on the following subjects: — 
Chemistry . Physics. Pharmacy . 
Botany. Materia Medica. Classics. 
The School has accommodation for One Hundred Students, and contains an excellent 
Museum and a veiy completely fitted Chemical Laboratory for Eighty Junior and Twenty 
Senior Pupils, with water and gas at every working bench. 
Registered Lodgings are provided for Country Students, where they can depend on com- 
fort and economv. 
For all particulars enclose a stanmed envelope to the Secretary, Mr. W. BAXTER, at 
hi-s Office. Central Public Lab'»ratoi y, Kennington Cross, London, S.E. 
EDWARD PATERSON, 
PHILOSOPHICAL INSTRUMENT MAKER, AND 
ELECTRICAL ENGINEER, 
3, BEDFORD COURT, COVENT GARDEN, LONDON. 
Professor Crookes’s Radiant Matter Tubes; Apparatus for Science 
Teachers and Schools and Colleges ; Apparatus of all sorts as recommended 
by the Science and Art Department, South Kensington. 
Illustrated Catalogue, Part 1, Elrdrical Apparatus, post free, 6d. 
,, „ Part 2, Ele&ric Signals, „ 6d. 
„ „ Part 3, Apparatus for Hire for 
Scientific Lectures. ,, 2d. 
