>|| KEUFFEL & ESSER CO. NEW YORK, j 



No. 4410. 



No. 4411. 



4410. Hypsometer (after Faustmann), brass, graduated surface 



silvered, hinged mirror mounted in aluminum, folding 

 sights, folding swiveling handle. In cloth covered 

 pocket with cover flap, 3| X 7 X f in. With 



Directions each $19 50 



This mirror-reading Hypsometer is 3| X 7 in. It is provided with two 

 scales : the scale of heights on the lower edge of the instrument and the 

 scale of distances on the two edges of the groove in which the slide moves. 

 The slide carries the plumbbob cord and has two reading lines marked I and 

 II, corresponding to the two scales of distances, also marked I and II. It is 

 held in place by a spring. The plumbbob is stored in a small tube at the back 

 of the frame. The peep-hole and hairline sights are hinged to fold down. 

 The hinged mirror is 5f X f in. The cylindrical nickel-plated metal handle 

 on the reverse side of the instrument swivels and also folds down. 



4411. Brass Ferrule, to fit the support with Gimlet, (No. 4402, pp. 5) 



or Jacob staff, or tripod each $ 1 00 



For Jacob Staff and Tripods see page 9. 



4412. 



Hypsometer (after Faustmann), like No. 4410, but of 

 polished hardwood, graduations on white facing with 

 protective coating, hinged mirror mounted in aluminum, 

 folding sights. Cloth covered pocket with cover flap, 

 3$ X 7 X | in. With Directions each $ 6 50 



