June 8, 1905J 



NA TURE 



Ivii 



SPECTROSCOPE 



(COI«S1'A.I«T' I>E:'VIA.mOI<I). 



The special advantages of this Spectroscope are — the Collimator 

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

 Stand in a corner, and is alivai/s ready for use 

 and in adjustment. 



The Prism is of the now well known CONSTANT 

 DEVIATION type. 

 Reads in Wave-lengihs Direct and with Great Accuracy. 



No. 5 



SPECTROMETER. 



Designed with special 

 reference to 



STANDARD ANGULAR 

 MEASUREMENTS. 



m==r^ 



ILLUSTRATED LIST OF SPECTROSCOPES AND 



SPECTROSCOPIC ACCESSORIES FREE UPON 



APPLICATION. 



ADAM: KIXjGER, Ltd., 75a Camden Road, London, N.W. 



GOLD MEDAL AWARDED, ST. LOUIS EXHIBITION, 1904. 





All other air 

 pumps superseded. 



THE, 



9f 



" G E R Y K 



(Fleuss Patent) 



Vacuum Pump. 



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 



S4 : 5 : 0. LIST F.45. 



putoo 



meter engineering C'CJ 

 einuironworhs. (2«ading« 



AWARDED MEDALS WHEREVER EXHIBITED, 



including g at the great Paris Exposition of 1900. 



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 



ofBeial records 

 on board the 



Antarctic ship 

 " Discovery.' 



CAMPBELL-STOKES SUNSHINE RECORDER, 



WITH CURTIS'S IMPROVEMENTS, 



as supplied to the Meteorological Office for their Standard Pattern. 



ANY KIND OFSCrENTIFIC INSTRUMENT MADE TO ORDER. 



Prompt Attention to all Orders and Inquiries. 

 im- EXCEPTIONAL TERMS TO COllECES, INSTITUTIONS, &C. 



Qtiotationssul-miltedfor Laboratory O utfits or Single Instrianents. 



THERMOMETERS FOR STUDENT WORK A SPECIALITY. 



Catalogues Post Free. (State which required.) 



8, 9, & 10 HATTON GARDEN, LONDON. 



