292 



NEGRETTI AND ZAMBRA, HOLBORN VIADUCT, B.C., 



FIG. 1156. FIG. 1157*. 



1156 Graphometers or Surveyor's Dials, 7i-mch divided circles, folding sights, 



level and bar needle and circular spirit compass, ball-and-socket tripod 

 stand, &o. In a mahogany box (fig. 1156) Price . . . 16 16 



1157 Miner's Compass, 4-inch, with folding sights in 



mahogany case 1 10 2 10 



1157* Ditto ditto, with Spirit Levels, &c., mahogany box 



(fig. 1157) 2 10 300 



1 158 Pocket Mining Compass, plain, with Sights, round brass 



box, bar needle, and stop (fig. 1158) .... 16 



1159 Ditto ditto, in round gilt metal case, with bar needle, 



and stop (fig. 1159) without sights . . . 15s. 18 150 

 See also Pocket Compasses. 



FIG. 1160. 



FIG. 1166. 



1160 

 1161 

 1162 



1163 

 1164 

 1165 



Surveyor's Cross, octagonal form (fig. 1160) . 



Ditto ditto, with Compass 



Ditto ditto (or Pantometre), with movable head 

 and Divided Circle and Compass (fig. 1162) of the best 

 construction 



Ditto ditto, with Tripod Stand, with ball-and-socket joint 



Optical Squares, for showing right angles . 



Ditto ditto, with adjustment in case .... 



FIG. 1162. 



Each. 

 s. d. 

 10 6 



Each. 



s. c 



12 



1 5 i 



10 

 10 



1 



16 



