MAX KOHL, A. G. 



MANUFACTURERS OF 



PRECISION MECHANICAL INSTRUMENTS 



LARGEST ESTABLISHMENT OF ITS KIND 



Furnish as a specialty complete outfits for Physical and Chemical 

 Laboratories ; Physical Apparatus and Instruments ; Apparatus 

 after Tesla, Hertz, Marconi, etc. Complete outfits for X-Ray 

 work. Purest Radium bromid of 1,200,000 x activity. 

 Demonstration apparatus for telephotography after Korn, giving 



excellent results. 



few Induction Coils for quick and distant radio- . NEW ! MEGADIASCOPE ! Mos 



graphics, spark-length 350 mm. Current in- per fect Projection Apparatus. 



tensity 3 and 50 milliamperes. oa air pnmp for ^ yacua 



High Tension Rectifier. I C"y. &*land. America. 



SPECIALTY : Acoustical Apparatus, such as pipes, tuning forks, 

 syrens, and all other high precision instruments of this kind 

 which were formerly supplied by Rud Koenig, Paris and Appunn 

 Hanau. 



One of my college customers in the U. S. A. writes : "I am 

 glad to be able to inform you that the tuning forks which you 

 supplied for the Department of Psychology compare very favor- 

 ably with ones previously obtained from Landry and Koenig and 

 are possibly superior. ' ' 



Profusely Illustrated catalogues with 3,500 Illustrations, di~ 

 reef ions, quotations, references, etc., in German, English or 

 French without any charge. 



World's Fair, St. Louis, 1904, Grand Prize and Gold Medal. 



World's Fair, Chicago, 1893; 2 Diplomas; World's Fair, 

 Paris, 1900. 



