KNOWLEDGE. 



October, 1910. 



TH E 



ZOLLNER 



STAR SPECTROSCOPE. 



ACTUM. 



SIZE. 



Recdmnicndei) l)\ I'UdF. A. roWLFH in his series o( articles 

 "The Chemistry (if the Stars." (A"«,.ii./tv4-, , IIMKI.) 



Adapleii to any Kyepicci;. with i Cylinder Lons £1 17 6 

 l-)itto, with tliree difierent ]30\vers of Cylinder 



Lenses, Complete in Morocco Case .. 2 10 



LIST OF ASTRONOMICAL SPECTROSCOPES POST FREE. 



ADAlVi: HILGER, Ltd., 



75a, CAMDEN ROAD, LONDON, N.W. 



Awarded GkANL) PRIZE, Brussels Hxhibitiun. igio. 



lliustrati\i L'Sfs of S/>vct rose opes atid Spectroscopic Apparatus o/ all 

 kinds Post Jrec. 



Telegrams: "' Sphericitv, London." Telephone: North 1687. 



rN/CROSCOPIC 

 Dmscopic 

 /zp/scopic 

 Speciroscopic 



ALL COMBINED IN ONE 

 APPARATUS OR SEPARATELY AS DESIRED. 



Simple YET Efficient 



Or5(»/PT/\f (ArALooui: fREE 0/v Request 

 /^E<yommAT//ni (i/vea/ by Appo/xtmem 



ELeitz. 



U.xroRi) House. 9 Qxfouu SiLoNnoNw. 



TelEPHOME ■ GEftRAPD 1674 



THE ZEISS TRAVELLING MICROSCOPE 



IN SOLID LEATHER CASE WITH NICKEL PLATED BRASS BINDINGS. 



DIMENSIONS 



10; X 6^ X 4." 



COMPLETE 



with Abbe Coiitienser 

 and Iris Diaphragm, 

 Triple Nosepiece, 3 

 Achroraats 23 , 16', 

 1 12 (Oil Immersion) 

 N.A.1.30,2Huyghenian 

 Eyepieces, 



£18 17 



Mechanical Stage 

 £4 5 extra. 



WEIGHT: 



Under 9 lbs. 



Light. 



Compact. 



Economical. 



Efficient. 



Prospectus 

 M.K. 

 Post 

 Free. 



CARL ZEISS (London) Ltd., 13-14, Great Castle St., Oxford Circus, London, W. 



