58 



L. CASELLA'S CATALOGUE 



FIG. 375. 



SURVEYING INSTRUMENTS. 



THEODOLITES, LEVELS, C1RCUMFERENTERS, ETC. 



In submitting the accompanying list of instruments to surveyors, engineers r 

 architects, etc., care has been taken to enumerate such only as embrace the latest 

 improvements. 



Where extra strength or rigidity has been required for any particular service, this 

 has been carefully given, and where lightness or great portability has been wanted, 

 as in light and handy instruments for travellers, or preliminary, surveys, the utmost 

 care has been taken to retain sufficient rigidity and to adapt all to the present advanced: 

 state of mechanical science. 



