62 



L. CASELLA'S CATALOGUE 



FIG. 393. 



394. Transit Instrument of superior construction, furnished with two setting circles 



divided to minutes, and especially adapted for mounting on stone piers, 42 

 inch., 3i-inch. object glass ..... 67 10 



395. Reflecting and Repeating Circles, of various construction to order. 



396. Altitude and Azimuth Instruments with circles, divided on silver, reading 



micrometers, etc., complete to order. 



*#* For astronomical telescopes, see index. 



CIRCUMFERENTERS OR MINERS' DIALS, CROSS 

 SIGHTS, ETC, 



* # * Circumferenters are now much employed in woody countries and mining districts ; the 

 three last Nos. in particular being so constructed as to replace the ordinary plain theodolite, 

 and may be used for obtaining either horizontal or vertical angles, with great facility. 

 The sizes quoted are those of the dials, the sights being much further apart. (See fig. 400), p. 63. 



397. Circumfereuter, 4-inch., with folding sights, in mahogany case, and jointed 



oak stand, with extra points for using at half-length . ' . 550 



398. CIBCUMFEBENTEE, 5-inch., as above, with divided cover . ' .~ H 770 



399. Circumferenter, 5-inch., with divided circle to compass, sights, cross levels, 



stand, etc., complete as above .... . v 9 00 



400. ClBCUMFEBENTEB, 6-inch., improved, with rack adjustments, divided cover, vernier 



reading to three minutes, cross levels, folding sights, ball and socket joint and 

 jointed legs, with spare points to use at half length (fir. 400), p. 63 10 10 



