Read Ebook: A Treatise on Meteorological Instruments Explanatory of Their Scientific Principles Method of Construction and Practical Utility by Negretti Enrico Angelo Lodovico Zambra Joseph

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Ditto ditto Fig. 8 ?3 3 0 3 10 0

Ditto ditto Fig. 9 ?4 10 0 5 10 0

Ditto ditto Fig. 10 8 10 0

Ditto ditto ditto handsome carved mountings, in mahogany, oak, or walnut wood ?8 8 0 ?10 10 0 12 12 0

Ditto ditto with two verniers 6 6 0

Ditto ditto mounted in ornamental carved frames, oak, walnut, or mahogany ?6 10 0 8 8 0

Ditto ditto Best mounted ?5 5s. 6 6 0

Extra Tube for ditto 1 15 0

Ditto ditto in carved ornamental mountings ?5 10s. ?6 6s. ?8 8s. 10 10 0

Ditto ditto rosewood, inlaid with pearl or metal. Made to order, Figs. 22 and 23. Price varying with size, &c.

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

Ditto ditto with raised ring on dial 5 5 0

Ditto ditto ditto with thermometer 6 6 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

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 ?2 2s. extra

Table Stands for Aneroid Barometers of Carved Oak or other woods, 10s. 6d., 25s., 35s., to ?5 5s.

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.

Ditto ditto larger sizes 7s. 6d. 0 12 6

Ditto ditto Engraved glass scales, Fig. 39 15s. ?1 1s. ?1 5s. 1 10 0

Fig. 38 10s. 6d. Fig. 40 10s. 6d. 15s. Fig. 41 5s. 6d. 8s. 6d. 12s. 6d.

Figs. 42 and 43. 12s. 6d. 15s. ?1 1s. ?1 10s. ?2 2s. 2 10 0

Hot Bed Ditto 12s. 6d. ?1 5s. 1 10 0

Ditto, ditto, on Negretti and Zambra's Patent Solid Porcelain or Metal Scales on oak mounting 0 12 6

Ditto, on Negretti and Zambra's porcelain or metal scales and oak mounting 0 12 6

Ditto, ditto, ditto, improved form, with test gauge 2 2 0

Brass Stands for above, Fig. 65 0 5 0

Extra Thermometer for Ditto 1 10 0

Wet and Dry Bulb Hygrometers, various mountings 30s. 25s. 21s. 14s. 0 10 6

Pocket Hygrometers, in box ?2 2s. 2 10 0

Aspirator for Ditto ?1 15s. 2 15 0

Ditto ditto in stout copper 0 15 0

Ditto ditto, of stout copper 1 10 0

Receiving Pots for ditto, extra 2s. and 3s. 6d.

Ditto ditto, Fig. 85, in copper 3 10 0

Ditto ditto, with sliding rod instead of graduated tube, japanned tin 2 2 0

Ditto ditto, Improved arrangement ?4 10s. 5 15 0

Ditto ditto, with clutch movement, Fig. 88 6 15 0

Large Air Meters made to order.

Ditto ditto, copper 1 5 0

ELEVEN HUNDRED ENGRAVINGS.

Royal 8vo. Cloth, Gilt Lettered--Price 5s. 6d.

FOOTNOTES:

Second Number of "Meteorological Papers," issued by the Board of Trade.

With reference to these barometers, we have received the subjoined testimonial, with permission to use it as we please.

"MESSRS. NEGRETTI & ZAMBRA,

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