SURVEYING INSTRUMENTS, 



THEODOLITES, LEVELS, C1RCUMFE RENTERS, 

 COMPASSES, ETC. 



Negretti and Zambia's Improved 7-inch Azimuth and Altitude Instrument, 



Or Transit Theodolite (Fig. 1107). See page 285. 



The construction and accuracy of the instruments enumerated in this section 

 being of the first importance, Messrs. NEGRETTI AND ZAMBBA devote special atten- 

 tion to this particular branch of manufacture, to insure the most perfect finish and 

 precision that can be obtained by modern improvements in machinery, dividing 

 engines, &c. 



