304 



NEGRETTI AND ZAMBEA, HOLBORN VIADUCT, E.G., 



1240 Levelling Staff, 14-feet, mahogany sliding in 3 lengths, with brass a . d. 



spring and fittings, Painted Scale, per Pair 550 see No. 1225. 



1241 Protractor Semicircular, brass, 6-inch, figured to 180 and to 360^. 



The arm 6^-inch long, with vernier reading to minutes with clamp 

 screw, and magnifying glass in mahogany case, both sides of 

 the arm parallel to the centre and zero (fig. 1241) . . ,330 



1242 Protractor Plain Circular, brass, 8-inch, figured outside to 360, and 



inside each quarter to 90, divided to half-degrees. In 

 mahogany case (fig. 1242) 220 



FIG. 1243. 



1243 Beam Compass, Mahogany beam inlaid with holly, graduated to 



50 inches, vernier reading to -^ inch, 48 inches between the points, 



ink and pencil points and clamping screws, in deal case (fig. 1243) 3 12 6 



1244 T Square, mahogany, 12 by 25 inches having the stock and blade 



flush on one side 12 



1245 Ditto ditto 12 by 52-inch 16 



1246 Angles, 6-inch, pear-tree, Set Square 45 020 



1247 Ditto 9-inch ditto ditto 30 030 



1248 Straight Edge, Steel, best London make, 2 inches wide, 42-inch, 



in deal case 140 



1249 Ditto ditto ditto 52 -inch, in ditto . . . 1 10 



1250 Parallel Rules, 15-inch, best Ebony rolling, plain edges . . . 16 6 



1251 Ditto ditto 12-inch ditto ditto 12 6 



1252 Ditto ditto 9-inch ditto ditto 10 6 



1253 Chain 100 feet with 3 oval rings between each link, stout brass 



marks, best stout iron 120 



1254 Ditto ditto four, Pole Gunter's . . ' 18 6 



1255 Arrows, set of 10 by 14-inch, If -inch eye 020 



1256 Dark Glass Horizon, in Brass Frame with 3 adjusting screws and 



Spirit Bubble ground on one side, in Mahogany Box . . .250 



1257 Centrolinead, for drawing buildings, &c., in perspective, the 



instrument giving the line of direction of the vanishing point .330 



1258 Elipsographs, for striking Ovals 330550 



1259 Ditto ditto, German Silver 4 12 6 



1260 Planimeter, Amsler's Patent Brass for computing areas . . . 3 15 6 



1261 Integrator, Ansler's 18 



1262 Goniometer, Wollaston's Reflecting, for measuring the Angles of 



Crystals . . .. . 550 



1263 Eidograph, capable of reducing any proportion from 1 to 6 inches 



in box complete . . . . 11 12 12 and 15 



1264 Computing Scale. Universal, as used by H.M. Tithe Commission 



Office, containing 1, 2, 3, 4, 5, 6 chains to the inch, and 6 inches 



and 5 feet to the Mill in Mahogany box 3 12 



1265 Extra Scales fitted to above 056 



1266 Computing Form Papers, 10, 20, 30, 40, 50, or 60 per sheet . .050 



