38 NA TORE [Mov. 4, 1869 
W) aA AM A Dp, 
11 & 12, BEAK STREET, REGENT STREET, W., 
(Scientific Instrument Maker by Appointment to the Royal Institution of Great Britain,) 
Manufactures Scientific Instruments of every description, including 
MICROSCOPES, TELESCOPES, SPECTROSCOPES, INDUCTORIUMS, 
And all Instruments for Philosophical research, 
CATALOGUES FORWARDED FOR TWO STAMPS. 
CROUCH'S STUDENT'S BINOCULAR. "Price £10 10s., £12, and ‘£15 15s, 
NEW GLASS CONCENTRIC STAGE, extra 21s. (See Catalogue.) ohia 
“Tt is one of the best instruments of its class; and the Author, after considerable use of it, can strongly recommend it to such as desire to possess a Binocular 
at once cheap, good, and portable.”—Carpenter on the Microscope, Last Edition. 
CROUCH’S UNIVERSAL PARABOLIC ILLUMINATOR, free by post, £1 Is. 6d. 
It is the best Illuminator for Opaque Objects, both by day and artificial light. 
Catalogues (Illustrated) of Microscopes, Accessories, Cabinets, Gc. on receipt of Three Stamps. 
HENRY CROUCH, 54, LONDON WALL, E.C. 
ORVENTAL: TO Oth Ve ASaneE: 
Established Forty Years as the most agreeable and effectual PRESERVATIVE of the TEETH 
and GUMS, Sold universally in Pots at 1s. 6d. and 2s. 6d. None genuine unless signed, 
LE LZ. Ee. Sa pat 
ee fe ae ee 
MANCHESTER. 
*enally, ane pared ; economical; ahont three times the strenth of the hest Cocoas ordinarily sold; free from the 
tter, and recomme d by mea cal men as the most wholesome brenkfast bevera 
fly examined the samples hrougcht une muy notice. and find that. they 
of Cocoa is just w hat | it a8 dee are al to he by: Messrs, Canneny Broviers. "—Lan 
Of the most nutritious, digestib 
enuine, and that 
nud restorative of 
MACMILLAN & CO’S PUBLICATIONS. |...,)112 MINIATURE (Spec TRO eC ouee 
This Instrument will show many of Fraunhofer’s Lines, the Bright Lines of 
the Metals and Gases, and the Absorption Bands in Coloured Gases, Crystals 
PROFESSOR ROSCOE’S “SPECTRUM | or Liquids. Hero 
ANALYSIS.” Lectures delivered in 1868. With Appendices, Price, with Five Prisms....... 8 me) 
Engravings, Maps, and Chromo-lithographs of the Spectra of the »» with Achromatic Lenses, adjustable slit. 2 2 0 
Chemical Elements and Heavenly Bodies. Royal Syo. 215. 
FORCE ANDN ATU RE: ATTRACTION JOHN BROWNING, Optical and Physical Instrument Maker to the Royal 
AND REPULSION. The Radical Principles of Energy gra- | Observatory, &c. &c. 111, Minories, London, E.C. 
phically discussed in their Relation to Physical and Morphological — 
Development. By C. F. WINSLOW, M.D. 8vo. 14s. 
“Dr. Winslow's treatise is one which deserves thoughtful and conscientious MARS. Four Stereograms of a Globe of 
study.”—Saturday Revi | the P’ ‘lanet Mars, by JOHN BROWNING, with a Chart of Mars on Mer- 
5 - cator’s Projection, and Descriptive Remarks on the Stereograms by R. A. 
Second Edition, this day. PROCTOR, B.A. F.R.A-S b Post free, Six Shillings ; single Stereograms, 
with Chart and Description, Two Shillin, 
MR. WALLACE’S “ MALAY ARCHI- | JOHN BROWNING, x 
PELAGO:” The Land of the Orang-Utan and the Bird of | _ oe ow: F 
Paradise. A Narrative of Travel, with Studies of Men and | 
Nature. Two Vols. Crown 8vo. With Nine Maps and more i Clee ee COUGHS, AND 
aa fGae | DISEASES OF THE CHEST BY DR. LOCOCK’S WAFERS. 
than 5° Illustrations, ak | From G. M. TWEDDLE, F.R.S.N.A. & F.S.A.S. puthon of *‘Shakspeare, 
his Times, &c.’ tokesley, Vork, Feb. 8, 1860. 
These Instruments can be adapted to the Microscope; price £r 2s. and 
£2 125. 64. New Illustrated Catalogue of Spectroscopes for 13 Stamps. 
CW. 
, Minories, London, E.C. 
“ 4 vivid picture of tropical life, which may be read with unflagging interest, 
and a sufficient account of his scientific conclusions to stimulate our appetite | ““T have always found them to give immediate relief to myself, my wife, 
without wearying us by detail. In short, we may safely say that we have | and chil ren, and witnessed their “good effects on my friends who were 
seldom read a more agreeable book of its kind.’—=Saturday Review. | asthmatical.” Price 1s. 14d. per Box. Sold by all Druggists. 
MACMILLAN & CO. LONDON. | . 
ee SERS = a = MINERALOGY AND MINING. —Roy yi 
MATHEMATICS FOR LADIES.—Mrs. | Scie of Mins Jermyn Street. ak WARINGTON W. SMYTH, ~ AG 
s Ss. 0! a FORTY LECTURES on MINERA- 
BOOLE is desirous of obtaining a few PUPILS (either singly or in classes) . will commence a Course o me 
in Arithmetic, Algebra, Analytical Geometry, the Differential Calculus, &c. | LOGY at One o'clock, and SIXTY LECTURES on MINING at Half-past 
Three o'clock, on Monday, the 8th of November, to be continued on each 
Address, care of Messrs. MACMILLAN & Co. 16, Bedford Street, Covent succeeding Tuesday, Thursday, Friday, and Monday, at the same hours, 
Garden, W.C. | Fee for each Course 42. TRENHAM REEKS, Registrar. 
