M. 



1905] 



NA TURE 



SPECTROSCOPE 



The special advantages of this Spectroscope arc — the Collimator 

 and Telescope are fixed at right angles, thus the instrument will 



xtfiud ill a cornel-, and is alwai/s readij for use 

 and ill. adjust me lit. 



The Prism is of the now well known COMSTAN'I 

 DEVIATIOX type. 

 Reads in Wave-lengths Direct and with Great Accuracy. 



No. 5 



SPECTROMETER. 



Designed with special 

 reference to 



STANDARD ANGULAR 

 MEASUREMENTS. 



ILLUSTRATED LIST OF SPECTROSCOPES AND 



SPECTROSCOPIC ACCESSORIES FREE UPON 



APPLICATION. 



AJyA^/L MILGER, Ltd., 75a Camden Road, London, N.W. 



GOLD MEDAL AWARDED, ST. LOUIS EXHIBITION, 1904. 



I 



All other air 

 pumps superseded. 





THE. 



"GERYK" 



(Fleuss Patent) 



Vacuufn Puncip. 



w 



R^esults hitherto only pos- 

 sible with mercury pumps 

 are readily obtainable by 

 the " GeryR." Used by 

 all leading scientists. Far 

 more rapid than any other 



vacuum pump. 

 "Price from Write for 



£4:5:0. LIST F.45. 



pulsometer Cnginccrinn G?.Ei 



Qinc eim»lronworh». R.eaOtng< 



AWARDED MEDALS WHEREVER EXHIBITED, 



includint; o at the great Paiis Exposition of 1903. 



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 

 otTieial records 



on board the 

 Antarctic ship 



" Discovery." 



CAMPBELL-STOKES SUNSHINE RECORDER, 



WITH CURTIS'S IMPROVEMENTS, 



as supplied to the Meteorologic.il Office for their Standard Pattern. 



ANY KINO OF SCIENTIFIC INSTRUMENT MADE TO ORDER. 



Prompt Attention to all Orders and Inquiries. 

 10- EXCEPTIONAL TERMS TO COLLEGES, INSTITUTIONS, &C. 



'<J„)/,tt;.y„s submitted U'r I. ah.,, ., lory Outfits or Single /tlsirnmcils. 



THERMOMETERS FOR STUDENT WORK A SPECIALITY. 



Catalogues Post Free. (State which required.) 



8, 9, & 10 HATTON GARDEN, LONDON. 



