340 NEGRETTI AND ZAMBRA, HOLBORN VIADUCT, E.G., 



Each. Each. 



s. d. s. d. 



1585 Six-Inch Ivory Sector Scales . .060080 



1586 Six-inch Ivory Protractors . ..''-. .050 06o 



1587 Ditto best full divided Ivory ditto ... 086 



1588 Twelve-inch Ivory Protractors, full divided ... 160 



1589 Red-line Protractor, best for Military Drawing . 066 



1590 Ditto ditto, Ivory . . . best with scale of feet 10 , 



1591 Six-inch Boxwood ditto Sectors . 026 



1592 Six-inch Boxwood Protractors 010 026 



1593 Six-inch Ivory best Navigation Scales, full divided . 10 6 

 !594 Six- inch Military best Ivory Scales .... 10 6 



1595 One-foot Gunter's Scales, Boxwood .... 030 



1596 Two-feet ditto ditto 050 



1597 Two-feet Sliding Gunter's Scales, (Bonn's) ... 10 6 



1598 Marquois Scales, Boxwood, in case complete 10 6 



1599 Ditto ditto, without case 086 



1600 Ditto ditto Ivory 3 10 



1601 Ditto ditto Metal 440 



1602 Gunner's Rules ,..'..- 10 6 



1603 Negretti and Zambra's 2-foot 4-fold Ivory Pocket 



Rule, combining the Protractor, Sector, and a 2-foot 



rule, best, full divided, in leather case ... 3 10 



FIG. 1611. 



1604 Protractors, in Horn, semi-circular, transparent, very 



convenient for roughly measuring angles on paper, 

 &C.: 



Divided into degrees 3-in. 3^-in 4-in. 5-in. 6-in. 

 6d. 8d. lOd. * Is. 6d. 2s. 



1605 Card Protractors, Ordnance Pattern .... 036 



1606 Brass Protractors, plain Semi-Circular . . .076 10 6 



1607 Brass Semi- Circular Protractors, plain divided to ^ degs. 



or 30 minutes . 110 1 10 



1608 Brass Semi-Circular Protractors, 6-inch, with Arm and 



Yemier, transparent centre (see fig. 1241, page 



303), in Box 330 



