BROWNING’S SPECTROSCOPES. 
The New Spe&roscope, with Micrometer, may be used for showing any of 
the leading experiments in Spe&rum Analysis ; the Fraunhofer lines ; the Lines 
in the Spe&ra of the Metals, and the Alkaline Earths and Alkalies ; the Speftra 
of Gases; and the Rain-bands. On a Telescope it will show the lines of the 
Solar Prominences. It can also be used as a Micro-Spedtroscope, and the 
position of the Bands in any Spedtrum can be seen with the Micrometer. Price, 
complete in Case, £z ios. 
Illustrated Catalogue of Spectroscopes , Six Stamps. 
HOW TO WORK WITH THE SPECTROSCOPE. 
By JOHN BROWNING. Bound in cloth, is. 6d. post free. 
JOHN BROWNING, 
Optical and Physical Instrument Maker to H.M. Government , the Royal Society , 
the Royal Observatories of Greenwich and Edinburgh, and the Observatories 
of Kew, Cambridge , Durham , Utrecht , Melbourne , &c., &>c. 
63, STRAND, LONDON, W.C. 
FACTORY — Southampton Street, W.C. 
ESTABLISHED MORE THAN 100 YEARS, 
South London School of Pharmacy, 
325, KENNINGTON ROAD. 
MANAGING DIRECTOR DR. MUTER 
Daily Leisures on tbe following subjects 
Chemistry. Physics. Pharmacy. 
Botany . Materia Medica. Classics. 
The School has accommodation for One Hundred Students, and contains an excellent 
Museum and a very 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- 
f ° rt For ah particulars, enclose a stamped envelope to the Secretary, Mr. W. BAXTER, at 
his Office, Central Public Laboratory, Kennington Cross, London, S.E. 
THE CHEMICAL 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, Ele<5tricity, 
and the collateral branches of Physical Science. It also contains an encyclopaedic list of 
chemical papers published abroad during the previous week, with abstra&s of all susceptible 
«f 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« 
