Fig. ioi No. 505 s-in. Theodolite with Cryptic Focus. "Wpter and Tarnish- 

 proof Graduations. Reversion Bubble, etc.. Mourned on Lateral 

 Adjuster ami Tunnel Trivet, and Otherwise Specially 



for the Interchangeable 

 Auxi: ,ope. 



Note: This instrument m.iv he supplied with any typ of Vertical 

 Circle or provided with a Diagonal Kyepiece or a Striding Level, etc. 



177 



