May I I, 1905] 



NA TURE 



ADAM HILGER, L^^- --^J?«- 



Speculum Plane and Concave Reflectors, Silvered 

 Glass Planes, Disc Prisms, &c. 



PARALLEL WEB, and POSITION MICROMETERS of hig-hest quality, 



SOLAR EYEPIECES (the Polarising- Solar Eyepiece is specially recommended), &c. 



And of EVERY KIND OF SPECTROSCOPE. 



Illustrated List Gratis on Application. 



T5a CAIVIOEN ROAO, LONDON, N.W. 



■ilvil iiidd Mi'dal St. Lui> 



All other air 

 pumps superseded. 





ff 



THE. 



"GERYK 



(Fleuss Patent) 



Vacuuiici Pump. 



R.esults hitherto only pos' 

 sible with mercury pumps 

 are readily obtainable by 

 the " GeryK." Used by 

 all eading scientists. Far 

 more rapid than any other 



vacuum pump. 

 Price from Write for 



£4:5:0. LIST F.45. 



puUometeT €ti9ineering G?.Ui 



OiiwClmtlronworUs.licading, 



AWARDED MEDALS WHEREVER EXHIBITED, 



MiL.udlng y at the great Paris KxpositiuH uf lyo. 



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 fop the 

 official records 



on board the 

 Antarctic ship 



■' Discovery." 



CAMPBELL-STOKES LUNSHINE RECORDER. 



WITH CLRTIS'-S IMPROVCMIiNTS, 



,,s Mii.iiliiil 1" ill': Mcttu..J..-i.:,il lllli,,u for then S[.,ii,Unl I'.illcin^ 



ANY KIND OF SCIENTIFIC INSTRUMENT MADE TO ORDER. 



Prompt Attention to all Orders and Inquiries. 

 S«- EXCEPTIONAL TERMS TO COLLEGES, INSTITUTIONS, &C. 



Qiiflatio,,!, iubin, tied for Labor., utryOnt/it!. orSin^U- /mtriiiiun.'t. 



THERMOMETERS FOR STUDENT WORK A SPECIALITY. 



Catalogues Post Free. (Stale which required.) 



8, o, & 10 HATTON OAkDKN, LONDON. 



