he figure we will take an example. Let the hight of the fixed point son,of Berlin.Germany,is intended for the solution of all prob- 3 (of the quantity 386 "75j is added to the readings so long as be 386'75 feet; the scale on the instrument has to be adjusted lems on the field in surveying and… … the constant length piece, c, of the instru- be screwed upon a tripod and adjusted in the ment, and which is formed of a steel plate. ordinary manner. The arrangement is such JAHN'S UNIVERSAL SURVEYING INSTRUMENT.-Fig. If P, Fig. 1, represents the point of which as has been already described, that…
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