=Negretti and Zambra's Self-recording Aneroid Barometer=, with =Clock= 22 0 0 48. =ANEROID BAROMETERS.= =Aneroid Barometers,= with card dials 4-1/2 inches diameter, best quality. 2 10 0 Ditto ditto with silvered metal dial 3 0 0 Ditto ditto with ditto and thermometer 3 10 0 Ditto ditto ditto with corrected scale, as supplied by Negretti and Zambra to the Royal Navy 5 5 0 =Aneroid Barometers=, with elegantly-chased dials 4 4 0 Ditto ditto with raised ring on dial 5 5 0 Ditto ditto ditto with thermometer 6 6 0 =Aneroid Barometer=, for altitude measurements with revolving ring, carrying index, range of scale 20,000 feet 4-1/2 inches diameter, with magnifier 8 8 0 =POCKET ANEROID BAROMETERS.= Fig. 34. 49 =Pocket Aneroid Barometer=, 2-3/4 inches diameter, with silvered metal scale 3 3 0 Ditto ditto for measuring altitudes to 10,000 feet compensated for temperature, in leather case 5 5 0 Ditto ditto ditto to 20,000 feet, with magnifier 6 6 0 50 =WATCH-SIZE ANEROID BAROMETERS= in gilt metal cases (see figure 35.) =Watch-Size Aneroid Barometer=, weather range L3 3 0 4 4 0 Ditto ditto of best construction, extra thin, for meteorological observations or altitude measurements to 10,000 feet 5 5 0 Ditto ditto ditto to 20,000 feet, compensated for temperature 6 6 0 Either of the above Watch-size Barometers may be had in Stout Silver Cases at a cost of L2 2s. extra _Watch-size Aneroid Barometers in Solid Gold, highly-finished cases. L15 15s. to L21._ Table Stands for Aneroid Barometers of Carved Oak or other woods, 10s. 6d., 25s., 35s., to L5 5s. =Ships' Aneroid Barometers=, in suitable mountings L2 10s. L3 3s. L5 5s. L6 6s. 47 =Sympiesometer=, for Ship use L3 3 0 4 10 0 Ditto ditto Pocket form, Fig. 32 4 4 0 The Sympiesometer is now rarely used, the Aneroid Barometer being found equally sensitive and less liable to derangement. 56 =Independent Standard Thermometers=, Fig. 36 5 5 0 57 =Standard Thermometers=, for Boiling Point Apparatus 1 10 0 =Chemists' or Brewers' Standard Reference Thermometers= L1 1s. 2 2 0 47 =Chemical Thermometers=, divided on the stem. Fig. 48. 10s. 6d. 0 15 0