IV 



KEUFFEL Se ESSER CO. NEW YORK. 



Penta-Prisiu Range Finder, for 



determining distances from a short base line 

 by sighting, and determining right angles. 



Traverse Table, simple 

 construction, brass alidade, 

 trough compass, hardwood 

 tripod. 



4330 



Plane Tables, various 

 patterns. 



Plaiiimeters, all kinds. 

 Indicator Planimeters, Polar 

 Planimeters, Compensating 

 Planimeters, Pantograph Plan- 

 imeters, Spherical Planimeters, 

 Rolling Planimeters, Integra- 

 tors, Integraph. 



Reckoning Ma- 

 chines for 12, 16 



and 18 figures. 



Calculat ions, 

 such as Addition, 

 Subtraction, Mul- 

 tiplication, Divis- 

 ion, Squaring", 

 Cubing, Extract- 

 ing of S q u a re 

 Roots, etc., can 

 be performed with 

 rapidity and un- 

 failing accuracy 

 and without men- 

 tal effort by means 

 of this machine. 



Tliaeher Calcu- 

 lating 1 11 s t r u - 

 meiit, reads to four 

 places, fifth place can 

 be estimated. 



See our general 500 

 ) catalogue. 



