BROWNING’S POCKET MICROSCOPE. 
The New Pocket or Field Microscope, on Firm Folding Brass Tripod Stand, 
with fine Adjustment, i-inch Objective, Large Field Eye-piece, Hand-pliers, 
&c. ; height when set up, io inches ; dimensions, packed in Morocco Case, 
5! inches long. Price £1 ns. 6d. 
Or with i-inch and 2-inch Objectives, Stage, Forceps, Stage Plate, and 
Dipping Tube, £2 2 s. 
List of Microscopes sent free. 
Illustrated Catalogue of Microscopes, with 41 Illustrations, 10 whole page 
Illustrations, sent for Six Stamps. 
JOHN BROWNING, 
Optical and Physical Instrument Maker to H.M. Government , the Royal Society , 
the Royal Observatories of Greenwich , Edinburgh , &c., &c. 
63; STRAND, LONDON, W.C. 
FACTORY — Southampton Street and Exeter Street, London. 
Prize Medal, 1862. Established ioo Years. 
Telescopes, Spectroscopes , Opera Glasses . &>c., &c. 
South London School of Pharmacy. 
325, KENNINGTON ROAD. 
MANAGING DIRECTOR DR. MUTER 
Daily Ledtures on the following subjects : — 
Chemistry. Physics. Pharmacy. 
Botany. Materia Medica. Classics. 
THE CII EMICAL NEWS 
Edited by WILLIAM CROOKES, F.R.S., &c. 
Published Weekly, price 4 d. Annual Subscription, £1, payable in advance. 
This Journal is devoted to Scientific and Applied Chemistry, and also embraces whatever 
tends to elucidate new discoveries in Mineralogy, Metallurgy, Mining, Mechanics, Eledtricity, 
and the collateral branches of Physical Science. It also contains an encyclopaedic list of 
chemical papers published abroad during the previous week, with abstradts of all susceptible 
of advantageous abridgment, thus making the two half-yearly volumes, with their copious 
indices, equivalent to an English edition of the “ Jahresberichte.” 
London : Boy Court, Ludgate Hill, E.C, 
