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y^vi mLgj 

 KEUFFEL 8c ESSER CO. NEW YORK. 



5712. K & E Abney Level, 6 in., arc graduated to degrees for 90 in 

 both directions, vernier to 5 minutes, Gradients from 1:1 to 1:10. 

 Base of tube is finished, so that the instrument can be used also 

 as a contact level. Compass 2 in., silvered dial divided to degrees, 

 needle about If in., agate centre and stop. Two screw sockets, 

 so that level can be mounted on the ball joint socket either with 

 the arc vertical or with the compass horizontal. 



Instrument complete with ball joint and socket, in stout 

 sewed, velvet lined leather slins; Case . each $20 00 



No. 5718 



5718 K & E Pocket Omnimeter, in sewed leather case each .f 15 00 



5719 like No. 5718, but with sights 



along one side of the frame, which fold into the 



frame, in sewed leather case " 18 00 



The K cV E Pocket Omnimeter combines a compass, clinometer, hand level, plumb 

 and contact level, so that it will indicate magnetic bearing, azimuth angles, altitudes, 

 levels and slopes. The Omnimeter with folding sights will indicate aximuth angles in 

 their horizontal plane. 



The combination is arranged in a rectangular frame of aluminum alloy, 5Kx2%xK 

 in. and weighs about 5 ounces. The frame serves also as fiduciary edge. 



The Compass of 2 in. diameter, has a needle with agate centre and stop. It is grad- 

 uated to 2 degrees, numbered in quadrants at every ten degrees. 



The Clinometer of 2 in. diameter, is of the pendulum disc pattern. It is graduated 

 to 2 degrees, reading to 90 degrees in either direction and to percentage of slope. 



The prism of the hand level is attached to one of the long sides and its bubble is on 

 the opposite side of the frame. 



The bubbles, are as sensitive as is permissible in a hand level. 



