JOHN J. HEATH, 



Ssta^blished 1828. 



General Engraver, Stationer, etc. 



BRASS DOOR PLATES- 



Medical Account Forms Engraved & in Facsimile. 

 Fleet St]:*eet, Sijummer JRow, 



A ^Tj^ T,¥ Y Y rri JW Ot- tlie late Finn of 



LITHOGRAPHER, 



niustrations for Scientific Publications 



Carefully reppodueed from Natural Specimens or Drawings 

 Estimates, and Specimens of work sent on application. 



II4< VILLIERS ROAD, WILLESDEN GREEN. 



LONDON, N.W. 



R. FIELD & Co., 



Opticians and Scientific Instrument 

 142, Suffolk Street, Birmingham. 



Makers of Established 1817. 



WRIGHT & ANDERTON'S Striated Silver Lantern Screens. 

 BAYLEY'S Polarimeter. 

 WELDON Range Finder, &c , &c. 



STUDENT'S MICROSCOPE 



Of best Continental model, with best diagonal rack and pinion 

 course adjustment, best triangular bar screw fine adjustment, 

 draw tube, joint for inclination, ^-iu. or ^-in. objective, and 

 i-in. (double combination) objective, and eye-piece, &c., in case, 

 iB5 - 5 - O. 



Plea-ie mention thU Journal in rejJijin'j to Advertisements. 



