OF SUKVEYING INSTRUMENTS. 



FIG. 382. 



40 



380. Transit Theodolite, 12-inch., for horizontal angles only 



*#* The above theodolites from 373 to 380 have improved locking plates or tripod screw 

 adjustment (asfig. 375), for stability, etc., but the 4, 5, and 6 inch, may be had with parallel 

 plates if preferred, at 30s., 45s., and 60s. each less respectively ; and if divided on the brass 

 circles instead of on silver, the 4, 5, 6, and 7 inch, would be 30s., 37s., 45s., and 60s. each less in 

 price. 



382. Everest's Theodolite (fg. 382), 4-inch., with verniers reading to one minute, 



divided on silver, with triple adjusting screws, separate triangular locking 

 plate (Jig. 382*), p. 60, mahogany case and tripod stand, complete 19 10 



383. EVEREST'S THEODOLITE, 5-inch., as above, reading to thirty seconds 22 



384. Everest's Theodolite^ 6-inch., verniers reading to twenty seconds, divided on 



silver, complete as above ..... 26 10 



385. EVEREST'S THEODOLITE, 7-inch., as above . . . 35 



TRANSITS AND CIRCLES. 



Portable Transit Instruments with divided circles, double verniers and micro- 

 scopes, cross axial level, three micrometric eye-pieces, diagonal eye-piece, 

 illuminating lanterns, graduated scales to levels, adjusting screws, etc., 

 complete (fig. 393), p. 62, packed in red deal case : 



WITH CAST IRON STANDS. 



386. Fourteen inch., 1^-inch. object glass as above, much used for testing and timing 



chronometers ...... 20 



387. Twenty-inch., If -inch., ditto, ditto . . . 22 10 



388. Twenty-four-inch., 2-inch., ditto, ditto . . . 25 



389. Thirty-inch., 2|-inch., ditto, ditto . . . . 38 10 



WITH BRASS STANDS. 



390. Twenty-inch., If-inch. object glass . . . . 26 



392. Twenty-four-inch., 2-inch, object glass .... 29 



393. Thirty-inch., 21-inch, object glass .... 44 



