149 



No. 1 d. 



As made by ('. L. Berger & Sons. 



Patented. 



Tachymeter. 



For size and particulars of this instrument see pages 142-145. 



No. 1 d, as in cut, graduation of horizontal circle on solid silver, opposite ver- 

 niers reading to 20" ; graduation of vertical arc on solid silver, verniers reading to 

 minutes; glass shades over verniers; detachable reading glasses for both circles, 

 11 inch telescope showing objects inverted, power 27 diameters; 3i inch striding 

 level; gradienter attachment ; fixed stadia wires ; etc. Standards cloth finished. 



Price, as above, $312.OO. 



This instrument without a detachable reading glass to the vertical arc, less $5.00. 

 " " with a 5-inch full vertical circle in place of the arc, 



protected by an aluminum guard, ....... extra 9.00 



NOTE. For a description of the striding level, its use and adjustment, see page 56. This striding level 

 and the detachable reading glasses, as shown above, can be attached only to our transits of the above descrip- 

 tion : we cannot attach them to instruments already made. 



Code Word Instrument as in cut, JBuiiielia. 



Instrument same as Bumelia but with full vertical circle and guard. 



liurton. 



