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KEUFFEIfe ESSER CO. NEW YORK, 



PRISMATIC COMPASSES. 



as Clinometer. 



No. 5400. 



as Compass. 



5400. Prismatic Compass, Clinometer and Altimeter, bronzed, pocket 

 size. Compass dial 2| in. diameter, graduated to degrees, 

 agate centre, automatic stop and spring check. Hinged 

 sight-vane with vertical wire, fiduciary edge for clinometer. 

 Clinometer and Altimeter formed by accurately balanced, sen- 

 sitive, weighted disc, 2| in. diameter, with stop and spring 

 check, giving slopes in inches per yard and in degrees, and 

 angles of elevation or depression in half-degrees. The incli- 

 nation is read off under the hair line on the cover glass. 

 The compass is read by the lens-front prism, which is ad- 

 justable for focus. Threaded for mounting on staff, in leather 

 sling Case, complete, with Directions each $ 27 00 



No. 5406. 



5406. Hand Transit, prismatic compass, clinometer and altimeter, like 

 No. 5400, but with reversible, sliding, adjustable mirror for 

 determining the bearing, in the horizontal plane, "of objects 

 above or below the level of the observer . . each 30 00 



