45, COENHILL, B.C., AND 122, REGENT STREET, W., LONDON. 



1609 Brass Circular Protractors, plain 6-in 8-'n. 10-in. 



25s. 32s. 42s. 



1610 Circular Protractors, Brass, 6-incli, (fig. 1610) with. Tangent screw 



adjustment and clamp to Yernier, in mahogany box . 



1611 Ditto ditto best 6-inch, divided on Silver, with 



Folding Arms (fig. 1611) . 



1612 Ditto ditto 7-in 



16] 3 Ditto ditto 8-in. 



FIG. 1615. 



1614 Station Pointers for Hydrographical Surveys, 6-inch 



plain, divided on Brass, with 12-inch arms 



1615 Best ditto 6 -inch, with Silver divided Circles and 



Yerniers, Tangent Screw adjustments (as fig. 1615), 

 with arms lengthening to 18 inches, in mahogany case 

 7-inch ditto ditto, arms lengthening to 24 inches 

 8-inch ditto ditto to 30 inches 



341 



Each. 

 s. d. 



12-in. 

 50s. 



4 15 



7 15 



11 

 13 

 15 15 



FIG. 1618*. FIG. 1619. FIG. 1618. FIG. 1610. 



1618 T or Drawing Squares, Mahogany, with Ebony Edges : 



12-inch plain (fig. 1618) 3s. 6d., with bevel (fig. 1618*) 4 



18-inch . . 4s. 5 



24-inch . 6s. 060 



36-inch , 4s. 076 



