45, CORNUILL, E.G., AND 122, REGENT STREET, W., LONDON. 307 



1288 ESTIMATE FOB A SET OF 



ORDNANCE PATTERN SURVEYORS 1 AND ENGINEERS' 

 INSTRUMENTS, 



AS SUPPLIED BY NEGRETTI AND ZAMBRA FOR 

 GOVERNMENT SERVICE. 



A 5-incli best Theodolite, divided on Silver, with Tripod Stand, as fig. No. 1100, 24 

 A 15 -inch Dumpy Y Level, with ditto, ditto, as fig. No. 1130 18 18s. 



Pocket Compass, 3 square, mahogany box. 2 circles of divisions, one, 360, the 



other figured 4'90. Best bar needle, 16s. 

 Surveying Cross, round, on Ash staff, as fig. No. 1160, 12s. 6d. 

 Drainage Level, with Tripod Stand, fig. 1134 5 5s. 



A 4-inch Circumferenter, folding sights, ball and socket joint, with jointed tripod 



stand, as No. 1150 7 7s, 



Ordnance Pattern Drawing Boards : 



Antiquarian . 55 by 33 inches. Atlas . . 37 by 28 inches. 



Double Elephant 43 by 29 Imperial . 32 by 24 



Prices various. 

 Prismatic Surveying Compass. 3-inch card, with Silver ring, in Pocket case, 



as No. 1168 3 10s. 



Best Pocket Sextant with Telescope, divided on Silver arc with Leather Case and 



Strap as No. 1303 5 5s. 



100 feet best Stout Chain, Brass handles, &c., as No. 1206 1 2s. 



4-pole best Gunter's ditto ditto, as No. 1209 18s. 6d. 



1 set 10 14-inch Arrows with eye If inch diameter as No. 1210*, 3s. 

 1 case of Brass Drawing Instruments : 2 10s. and 3 3s. 



Mahogany box with Tray containing 6-inch ivory scale, 6-inch ebony parallel rule, 



6-inch compasses with pen and pencil points, lengthening bar, pen and pencil 



bow, large and small ivory handle drawing pens, set screw, 6 drawing pins, &c. 



3 3s. 



Best Mercurial Horizon, complete in box 4 10s. 



6 -inch Sextant divided on Silver to 10 seconds, with plain tube, two Telescopes with 



additional power and dark glasses in mahogany case, 



10 10s. and 11 11s. 



Tripod Stand for ditto, with jointed legs 3 3s. and 5 5s. 



30-inch brass Pentagraph, as fig. 1266, in mahogany box 10 10s. 



Mountain Barometer in solid Leather case and brass stand, as No. 1179, 10 10s. 

 Aneroid Barometer or Orometer, as No. 1180 for Altitude measurements, 8 8s. 

 Pocket Thermometer, Oval Boxwood, 7-inches long, to l40 Fahrenheit and 



Centigrade Scales .... See also Section Thermometers 12s. 6d. 

 Altitude Tables for use with above, sent with each instrument. 

 Boiling Point Apparatus and Tables, see page 92. 



