ADVERTISEMENTS. 



HmtfacJttrm d ®ptkni mti Patljtiua&al litstantents. 



COMPOUND ACHROMATIC MICROSCOPES. 



OF THEEE CLASSES. 



FI^ST CLASS. 



In ■which the Magnifying Power, the Stand, and the Illumination, 

 are carried to the greatest poasible perfection. 



Price, from £30 to £84. 



" The arrangement of the Illuminating Apparatus in Smith & 

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

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

 point of general eicellenee of workmanship, this instrument cannot 

 be surpassed." — Carpenter, on Microscope, First Edition, page 103, 



\Vm. B.Carpenter.M.D., F.R.S. 



John Goodsir, F.E S. 



John Edward Gray. 



William Gull, M.D. 



George Jackson, M.R.C.S.E. . 



£d?rin Lankester, M.D., F.B.S. 



MICROSCOPIC OBJECTS. 



A large Assortment of Objects of Scientific and Ge- 

 neral Interest kept constantly in stock. 



Price, from Is. 6d. 



SECOND CLASS. 



In which the same Magnifying Power as the former is combined, 

 with a less expensive Stand and Apparatus for Illumination. 



Price, from £13 to £40. 



These Instruments are improvements tipon that mentioned hy Dr. 

 Carpenter on Microscope, First Hdition, page 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 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." 



THIRD CLASS. 



EDUCATIONAL, 



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

 o the requirements of most observers j and the cost is considerably 

 less than in the two other classes. 



Price, £10 or £15. 



An Illustrated Descriptive Pamphlet of the Educational Micro- 

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

 ncludes testimonials from the following eminent Microscopists ; — 



John Lindley, Ph.D., F.K.S., 



F.L.S. 

 George Rainey, Esq. 

 B. ^^'. Richardson, P.R.O.S.I. 

 William Smith, F.L.S. 



A careful 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, Trachaea, Spiracles, etc. 



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

 recent and fossil, f. 



Also SpecimflMof Sponge and Gorgonia Spicules, Algae, Zoo- 

 phytes, etc., etCi" 



ACHROMATIC STEREOSCOPES. 



" Messrs. Smith & Bi;ck have not only carried out, they have 

 gone beyond our suggestions. The result is a perfection beyond 

 which it is hardly possible to carry the Stereoscope."— ^Mena-ioH,'* 

 August 28, 1858, page 269. f 



Achromatic Stereoscope, in Walnut Wood . . £3 \Q Q 



Ditto, ditto, in Mahogany , . .330 



Handsome Pedestal Stands for the above, forming also 



Cases for Views, from . £2 5s. to 4 15 Q 



An Illustrated Description forwarded on application. 



Stereoscopic Photographs of the Moon, on Glass, from 

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

 E.A.S., etc. . . . . • £ 10 6 



Glass Transparencies, including Views in Switzerland, 

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

 the Rhine, and various Continental Towns, each .076 

 A very choice Assortment of Views on Paper. 



GORHAM'S KALEIDOSCOPIC COLOUR-TOP. 



(See "Microscopical Journal," No. XXVI.) 



Prvoe . . . . . .£110 



Extra Set of Rotating Discs, per dozen . .050 



This Instnimont shows the various beautiful effects of the Com- 

 ))ination of Colours, etc. 



6, COLEMAN STREET, LONDON, E.C. 



Catiilugves, etc., sent free on Application. Foreign Orders to be\ 

 accompanied nith a Hemittamct, 



