As made by C. L. Berger & Sons. 



No. 11 a. Complete Tran- 

 sit-Theodolite, with striding 

 level attachment and vertical circle 

 as in cut. (Lower half of instrument 

 as shown in cut of Complete Tran- 

 sit-Theodolite No. 11.) 



Instrument has three levelling 

 screws with shifting center; G%~'mck 

 horizontal circle, graduation on solid 

 silver reading to 20"; two rows of 

 tiuurcs from to 360 in opposite 

 directions; o-inch vertical circle: 

 double opposite verniers reading to 

 minutes ; two reading glasses and 

 glass shades for each circle ; two 

 plate levels; Jl^-inch inverting 

 telescope, aperture 1^ inches, power 

 27 diameter; 4^-inch striding level 

 to telescope with reversible clamp 

 and gradienter to telescope ; 4^4-m. 

 transverse striding level as in No. 

 lib; fixed stadia wires. 



Weight of instrument about 15 

 His. ; weight of tripod 10 to 12 Ibs. 

 Price, as above, $445.OO 



NOTE. In place of a fixed level the above instrument has a striding level parallel to line of collimation, 

 which can be mounted on the telescope whether it is in a direct or in a reversed position. This attachment 

 renders the adjustment of the telescope for leveling nearly as simple in the Transit as in the Wye level. On 

 the other hand a fixed level to the telescope commends itself for this class of instruments on account of greater 

 compactness, simplicity and readiness for use, and ivhen properly adjusted it is quite as accurate and more 

 apt to stay in adjustment than the striding level with its greater number of pieces and adjustments, not to 

 speak of its greater liability to in jury. 



No. lib, 



As made by ( . L. Berger & Sons. 



No. lib. Com- 

 plete Transit-The- 

 odolite, transverse 

 striding level resting 

 on top of pivots at circle c 

 contact in wyes, vertical cir- 

 cle, as in cut. Size and par- 

 ticulars as in No. 11 a. 

 Telescope has no level and in con- 

 sequence the vernier frame of the 

 vertical circle carries a 3-inch 

 level by which a complete control 

 of the position of its verniers is 

 assured when vertical angles are 

 measured. (See instructions for 

 using Universal Mining Transit, page 177.) Price, as above, $42O.OO 



No. 11 a and No. lib, 7 -inch horizontal limb graduated to read to 10", Price, extra, 2. r >.OO 



No. lib, provided with a 4^-inch striding level telescope, 4O.OO 



No. lib, provided with a 6-inch fixed level to telescope, 2O.OO 



No. 11 a, 3-inch level to vertical circle, as in No. 11 b, lO.i'O 



No. 1 1 a and No. lib, without reading glasses to vertical circle, Legs 1 0.OO 



No. 11 a and No. lib, without a striding level for the telescope axis, 35.0O 



NOTE. If desired, a striding level as in No. 11 a, with reversible clamp and gradienter to telescope 

 can be attached tc our Plain Transit-Theodolite, No. 11, in place of a fixed level. Price, S6O.OO 



