Berger, C.L., aamp; Sons, Boston. may be reset for the co-latitude at any time by simply centering the bubble. This level is attached to the end of the horizontal axis of the transit, as shown in the cut. It does not interfere with the use of the transit foranbsp;...
|Title||:||Manual, Berger Instruments of Precision for Engineers, Surveyors, Astronomers|
|Author||:||Berger, C.L., & Sons, Boston|