September 28, 1905J 



NA TURE 



NEW MODEL SPECTROPHOTOMETER 



For accurate quantitative measurements of Sight absorption. 



ADVANTAGES— 



Very great accuracy 

 is readily obtainable. 



The Wave-length 

 of the portion of the 

 Spectrum under 

 olijservation can be 

 read off direct. 



The Telescope is 

 fixed. 



Can be used for— 



Me.nsurements of 



Photographic 



Densities. 



Absorption of 

 Liquids, &c. , for 

 hglit of any desired 

 wave-length. 



Intensity of 

 Illumination of 

 Light Sources 

 throughout the 

 Spectrum. 



Can be seen h\ appointment at the follo^^'ing addi^ess : — 



AjyR.1^ MILOER, ]L.td., 75a Camden Road, London, N.W. 



AWARDED GOLD MEDAL ST. LOUIS EXHIBITION, 1904. 

 Teli-ijfiipliii- A<f<1i<-ss :—'• Sphericitji, Louilnii." 



ILLUSTRATED LIST ("A") OF SPECTROSCOPES AND SPECTROSCOPIC ACCESSORIES 

 GRATIS ON APPLICATION. 



The Instrument is 

 rigid, and all the 

 parts required for 

 measurements are 

 mounted on one 

 strong base. 



KAHLBAUM'S 

 CHEMICALS. 



JOHN J. GRIFFIN & Sons, 



LTD., 



SARDINIA STREET, 



LONDON, W.C. 



AWARDED MEDALS WHEREVER EXHIBITED, 



including 9 at ttie great f.ui, Ivm-'-'mIut, of in:-.. 



JAS. J. HICKS, 



8, 9 & 10 HATTON GARDEN. LONDON, 

 SCIENTIFIC INSTRUMENT MAKER 



WAR OFFICE, INDIA 'OFFJCE, ADMIRALTY, &c. 



WHOLESALE MANUFACTURER 



Meteorological and Scientific Instruments 



OF t,VEIiV DE.SCRIPT10N, INCLUDING 



STANDARD MERCURIAL BAROMETERS, 

 STANDARD ANEROID BAROMETERS, 

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 Tables, POLARIMETERS, Pyrometers, RANGE 

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 meters, Sunshine Recorders, THEODOLITES, Wind 

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 Catalogues Post Free. (Slate which required.) 



ANY KIND OF SCIENTIFIC INSTRUMENT 



MADE TO ORDER. 



Prompt At tention to all Orders an d Inquiries. 



f]tr Exceptional Terms to Colleges, Institutions, &c. 



; Q„c,/a/wns submitted for Lalwralory Out/its or Single hislruments 



; THERMOMETERS FOR STUDENT WORK A SPECIALITY 



