168 NEGRETTI AND ZAMBEA, HOLBOBN VIADUCT, E.G., 



Each. Each. 



s. d. s. d. 



351 Confectioners' Sugar-boiling Thermometers, in Round 



Brass Cases, strongly mounted, range of scale 400F. 



to 600F 10 6 



352 Vinegar Makers' Thermometers, various . . .036 056 



353 Ditto ditto without any Metal mountings, as fig. 292 . 10 6 15 



354 Varnish Makers' Thermometers, with strong Metal 



mountings, 3 feet long, form as fig. 347 . 1 16 2 2 2 10 



355 Hay Stack Thermometers, or "Rick" Temperature 



Tester, 7 to 8 feet long, strong Iron Mounting, with 



N. and Z's. Patent Registering Thermometer . 1 10 



Extra Thermometer for ditto 12 6 



356 Boiling Point Thermometers, for determining heights 



by observing the Boiling point of water. See page 93 1 10 



357 Alarm or Valve-regulating Thermometers, mounted on 



a Mahogany board or Brass stand . . . from 220 



358 Thermostat or Metallic Thermometer, for similar purposes as 



above, an arrangement of Metallic bars of different metals made to order. 



359 Leslie's Differential Thermometers, for delicate experi- 



ments on Radiant Heat, &c. (See page 187) . . . 1 10 220 



360 Air Thermometers for ditto ditto . . . . 15 110 



Boyle's arrangement, one of the earliest forms of Thermometer used. 



361 Still Thermometers of various lengths and mountings 



figs. 379 and 347 made to order. 



362 Steam Pressure Thermometers (or Thermo-Pressure 



Gauge), in strong Brass case (fig. 362) . . . .150 1 15 



363 Ditto ditto with Hinged Door and plug for closing the 



boiler when the Thermometer is not in use (fig. 367) . 220 



364 Hot Water Thermometers, for low pressures, small size 



(fig. 364) for attaching to Hot Water Warming 



apparatus, &c 18 140 



365 Cooking or Culinary Thermometers, of various forms, 



see also 342 343 and 348 10s. 6d. 12 6 110 



366 Fryometer, as used at the National Training School of 



Cookery, South Kensington. Copper Mountings . 16 6 



367 Vacuum Pan Thermometers, stout Brass mounting with 



hinged or Revolving Door, as fig. 367 . . . .220 2 10 



368 Hot Air Thermometers, for Turkish Baths, various 



forms 16s. 110150 1160 



369 Upcast Shaft Thermometers, Self-Registering, from 50 



to 600 enclosed in round Copper Case , 1 12 



370 Ditto ditto, or Hot Blast Thermometer, for High 



temperatures in furnace shafts (fig. 372) ... 1 10 



371 Registering Air Shaft Thermometers, Negretti and 



Zambra's Improved, for ditto ditto See page 170 . 220 



372 Super Heated Steam Thermometers, with Patent 



Porcelain Scales, in strong japanned Iron mountings 



(fig. 372) 1 10 



373 Ditto ditto ditto smaller size. 150 



374 Super Heated Steam Thermometers, with Brass 



mountings, as figs. 362 and 367 220 2 10 



