

Portable Transit Instrument for Latitude Observations. 



As made by C. L. Berger & Sons. 



No. 16. Aperture of object-glass 3 in.; focus 28 in.; spider-line or glass 

 micrometer ; micrometer screw reads to seconds of arc ; spirit-levels read to seconds 

 of arc ; diagonal eye-piece SO dia. ; Ramsden eye-piece 40 dia. ; vertical circle 8 in. 

 India.; bell-metal pivots, two lamps and arms, adjustable reflector; reversing 

 apparatus ; two cases, etc. 



Price $980. 



