Parts of Instruments, 



As made by C. L. Berger & Sons. 



Showing the extent to which Aluminum bronze (containing 90# copper), or Aluminum alloyed with 

 only a small percentage of copper or silver, in being utilized in the manufacture of our Instruments. 



(Before ordering any of the above parts please read "Aluminum for Instruments of Precision,' 1 '' Page 27. 

 also notes following). Parts of Aluminum which are not of general adoption are indicated by the extra char ft 

 mide below. 



