December 29, 192 1] 



NATURE 



cxliii 



SECOND-HAND MICROSCOPES. 



Beck Standard London Model, latest, with 2-speed fine adjustment, 

 §', i', i/12'o.i., triple nosepiece, Abbe, and case .. t18 10 



Ditto, f ', i', and double nosepiece £12 17 8 



Bausch & Lomb, \', i', triple nosepiece, spiral focussing Abbe, and case 



(new) £18 10 



Swift, \', i', double nosepiece, Abbe condenser, and case . . £9 9 

 Crouch, \' , i", double nosepiece. Abbe condenser, no case £5 5 



Oil Lamp, new, latest model £2 5 



liew Microscope List free upon request. 



SECOND-HAND TELESCOPES. 



2}' Troughton & Simms, on equatorial stand, divided circles, slow 

 motions, steadying rods, 5 eyepieces, 2 mahogany cases. 



£35. Cost double 

 i\' Browning, trunnion garden stand, 2 eyepieces, and case £12 10 

 Several Second-hand 3' Students, from £6 15 0. 

 New; Telescope List free upon request. 



BROADHURST, CLARKSON & CO. 



Note A ddress : — 



TELESCOPE HOUSE, 



63 FARRINGDON ROAD, LONDON, E.C.I 



FEES QUOTED 

 riiiiiiiiiiiiii UPON REQUEST 



TohnJSonKfettBeveYS ltd 



73-82 HATTON GARDEN LONDON. E C.I 



Estab.] STEVENS'S AUCTION ROOMS, LTD. [1760 



'A SALE by AUCTION is held EVERY FRID.W, at 12.30, which 

 affords first-class opportunities for the disposal or purchase of 

 SCIENTIFIC, OPTICAL, and ELECTRICAL APPARATUS, 



Microscopes and Accessories, Telescopes, Surveying Instruments, Photo- 

 graphic Cameras and Lenses, Cinematographs and Films, Lanterns and 

 Slides, Lathes and Tools, Books and Miscellaneous Property. 



Frequent Sales of Natural History and Ethnological Specimens, 

 Curiosities, etc., are also held. 



Catalogues and terms for selling will be forwarded on application to 

 38 King Street, Covent Garden, London, W.C.2. 



REICHERT 

 MICROSCOPES 



and 



accessories 



British Agents : 



0. C. Rudolph & Beesley 



65 Margaret Street, 

 Oxford Circus, London, W.l 



OLD PLATINUM, GOLD, 



Dental Alloy, Scrap, &c.. 

 Purchased for Cash or Valued. 



5PINK & 50N, Ltd., 



17 & 18 PICCADILLY. LONDON, W.l. 



EST. 1772. 



Fine Jewels or Plate also purchased or valued. 



W. P. THOMPSON, 

 F.CS., M.l.Mech.E., C.P.A. 



G. C. DTMOND. 

 M.I.Mech.E., CP.A. 



W. p. THOMPSON & CO., 



12 Church Street, LIVERPOOL, 



Chartered & Registered Patent Agents. 



H. B. POTTS, 



M.Sc, Hon. Chem., C.P.A. 



J. V. ARMSTRONG. 



M.T.L, CP.A. 



