ADVEETISEMENTS. 





COMPOUND ACHROMATIC MICROSCOPES, 



OF THREE CLASSES. 



IFIiaST CXiJLSS, 



In which the Magnifying Power, the Stand, and the Illaiaination, 

 are carried to the greatest possible perfection. 



Price, izom £30 to £84. 



" The arrangement of the Illuminating Apparatus in Suith & 

 Beck's Microscope seems to the author to present gome decided 

 advantages over that adopted by either of the other makers, and in 

 point of general excellence of workmanship, this instrument cannot 

 be surpassed." — Carpenter, on Microscope, First Edition, page 1C3. 



SIEOOIiTX) Cli^SS- 



Having the same Magnifying Power as the former, but combined 

 with a less expensive Stand and Apparatus for Illumination. 



Price, from £15 to £40. 



The$e Instruments are improvements upon that mentiotied by Dr. 

 Carpenter, First Edition, pojge 87. 



" Of the patterns yet devised for a Microscope of simple con- 

 struction, which shall yet be capable of answering every essential 

 purpose, whether of display or of investigation, that of Smith & 

 Beck's appears to the author to be (to say the least) among the 

 best, and he recommends it with the more confidence, since he has 

 for many years employed one of these Microscopes as his own work- 

 ing instrument." 



EDUCATIONAL. 



The capabilities of this Instrument are limited, but they are equal 

 to -the requirements of most observers ; and the coat is considerably 

 less than in the two other classes. 



Price, £10 ox £15. 



An Illustrated Descriptive Pamphlet of the Educational Micro- 

 scope will be forwarded on receipt of six postage stamps. It 

 includes tesUmonials from the following eminent Microscppists : — 



MICROSCOPIC OBJECTS. 



Dr. William Gull. 

 John Lindley, Ph.D. 

 Dr. Carpenter. 

 Professor William Smith. 

 J. E. Gray, Ph.D. 



Professor Goodsir. 

 Georpe Rainey, E.iq. 

 George Jackson, Esq. 

 Dr. Lankester, and 

 B. AV. K chardson, Esq. 



A large Assortment of Objects of Scientific and General Interest 

 kept constantly in stock. 



Price, £rom Is. 6d. 



A carefiil selection of Six Dozen Objects in a neat Mahogany 

 Case. 



Price £4. 



This series comprises Illustrations of the following subjects : — 

 The Structure of Bone, Horn, Hoof, Tendon, Hair, Feathers, 

 Scales, Skin, etc. 



The various parts of Insects, viz. : — Head, Eye, Tongue, Ely- 

 tron, Wing, Foot, Sting, TrachiB, Spiracles, etc. 



Of Vegetables : — Spores, Starch, Sections of Wood, Diatomacece, 

 recent and fossil. 



Also Specimens of Sponge and Gorgonia Spicules, Alga-, Zoo- 

 phytes, etc., etc. 



I 



oncL 



ACHROMATIC STEREOSCOPES. 



(See the "Fliotographie Journal," Jamia/ry 1, 1839.) 

 Achromatic Stereoscope, in Walnut AVood . . £3 10 



Ditto, ditto, in Mahogany . . -33 



Handsome Pedestal Stands for the above, forming also 



Cases for Views, from £2 5s. to 4 15 



An Illustrated Description forwarded on appUcation. 



" Messrs. Smith & Buck have not only carried out, they h 

 gone beyond our suggestions. The result is a perfection bejoi? 

 which it is hardly able to carry the Stereoscope." — Athenmum, 

 August 28, 1858, page 289. 



Stereoscopic Photographs of the Moon, on Glass, from 

 Negatives taken by Warren Delarue, F.R.S., Sec. 

 to R.A.S., etc. . . .£i 



Glass Transparencies, including Views in Switzerland, 

 Egypt, the Pyrenees, Heidelberg, Spain, the Tyrol, 

 the Bhine, and various Continental Towns, each . Q 

 A very choice Assortment of Views on Paper. 



GORHAM'S KALEIDOSCOPIC COLOUR-TOP. 



(.Siee "Microscopic Journal," No. XXVI.) 



In Wood -11 



In Papier Mache -15 



Extra Set of Rotating Discs, per dozen -05 



This Instrument shows the various beautiful effects of the Col 

 biuation of Colours, etc. 



6, C0I.i:ilXAN STREET, I.0ND0Z7, E.C. 



Catalogues, etc., sent free on AppUcation, Foreign Orders in 

 accompanied with a Remittance, 



