July 6, 1905 J 



NA TURE 



HIGH-CLASS POLARISCOPE 



(x>e£i<lin^ to -OOS cBegree). 



Awarded 

 Gold Medal 



St. Louis 



Exhibition, 



1904. 



Telegraphic 



Address : — 



" Sphericity, 



London." 



Illustrated 



List ;"A") 



of 



Spectroscopes 



and 



Spectroscopic 



Accessories 



Gratis 



on 



Application. 



AjyiL^/L 'H.TTmGETI, Ltd., 75a Camden Road, London, N.W. 



^Lm 



All other air 

 pumps superseded. 



THE, 



ff 



" G E R Y K 



(Fleuss Patent) 



Vacuum Pump. 



R.esults hitherto only pos- 

 sible with mercury pumps 

 are readily obtainable by 

 the " GeryK." Used by 

 all leading scientists. Far 

 more rapid than any other 



vacuum pump. 

 Price from Write for 



S4 : 5 : 0. LIST F.45. 



puUoi 



Qin* eim»lrgDworh5. Reading. 



AWARDED MEDALS WHEREVER EXHIBITED, 



including y .'it the ureal I>.-i,i, Exposition of .9.0. 



JAS.J. HICKS, 



WHOLESALE MANUFACTURER OF 

 SCIENTIFIC AND CHEMICAL APPARATUS 



WAR OFFICE, INDIA OFFICE, ADMIRALTY, 



ROYAL COLLEGE OF SCIENCE (LONDON), 



GOVERNMENT LABORATORY, 



MANCHESTER SCHOOL OF TECHNOLOGY, &c., &C. 



Selected and 



used for the 

 official records 



on board the 

 Antarctic ship 



" Discovery." 



CAMPBELL-STOKES SUNSHINE RECORDER, 



WITH CIJRTI5'S IMPROVEMENTS, 



as supplied to the Meteorological Office for their Standard Pattern. 



ANY KIND OF SCIENTIFIC INSTRUMENT MADE TO ORDER. 



Prompt Attention to all Orders and Inquiries. 

 m- EXCEPTIONAt TERMS TO COtlEGES, INSTITUTIONS, &C. 



Quotations SHbmittM for Laboratory Outfits or Single Instruments. 



THERMOMETERS FOR STUDENT WORK A SPECIALITY. 



Catalogues Post Free. (State which required.) 



8, 9, & 10 HATTON GARDEN, LONDON. 



