An essay on electricity : explaining the principles of that useful science, and describing the instruments, contrived either to illustrate the theory, or render the practice entertaining : illustrated with six plates. To which is added, a letter to the author, from Mr. John Birch, surgeon, on the subject of medical electricity / by the late George Adams.

George Adams Jr.

Date:: 1799

Credit: An essay on electricity : explaining the principles of that useful science, and describing the instruments, contrived either to illustrate the theory, or render the practice entertaining : illustrated with six plates. To which is added, a letter to the author, from Mr. John Birch, surgeon, on the subject of medical electricity / by the late George Adams. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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[ 10] Cavallo’s atmospherical electrometer 0 12 Ditto, as improved by Saussure 1 1 Bennet’s gold-leaf electrometer O IS An electrophorns, from lOr. Qd. to . 3 3 Conductors for the preservation of ships, houses, &:c. from lightning, from 3/. 3r. to 5 5 d. O O o 0 o 7 he Medical yipparatus consisis of, Jars with electrometers, from J2r to 1 1 o A new medical ditto, for communicating shocks in the most convenient and qualified manner 0 p 6 A pair of directors, glass handles, wood points, &c 0 7 () An electrometer to apply to the conductor 0 6 6 A brass ball and wire for taking sparks, dr. to () 0 O Electrical insulated stools and chairs, from ()r. to 5 5 o A new perpetual infiammable air-lamp, lighted by the electrophorus, a curious and useful apparatus 4 4 0 A variety of other apparatus, too numerous to be inserted here, which, as well as the machines, are mounted from the most approved eligible methods,so as to render them in a'ction both powerful and permanent. P'ar a descriptiot? of electrical apparatus, see the late Mr. G. Adams’s Essay on Elec- tricity, ^yW. Jones, %vo. six plates-, new edition, price'is. in boards. Barometers, jfiain mounted, from ll. Hr. 6d. to 2 12 Q Thermometers for all the various purposes, from 9r. to .. .. 3 3 O Six’s new thermometers, for shewing the extremes of heat and cold, in the absence of the observer, from 1 /. 1 Ir. Qd. to 2 12 6 An hygrometer, shewing the moisture and dryness of the air 0 10 6 Barometers, thermometers, and hygrometers, all in one neat mahogany frame, from 4/. 4r. to 6 6 O Barometers for measuring the heights of mountains, from 7r. to 10 10 0 Marine barometers, diagonal, wheel, and statical ditto. New hygrometers, constructed by De Luc,&:c. from 2/. 2s. to 3 3 O A rain gauge, with float and tin vessel 0 18 O Wind gauges, of the constructions of Dr. Lind, &c 0 lO O Hydrometers, for discovering the strength and proportion of compound in spirituous liquors, from iL ps. to 3 3 O Hydrostatic balances, from l/. Ir. to ,. 9 9 o An apparatus for hydrostaticalexperiments,from 3/. I3s.6d. to 21 O 0 Artificial magnets in bars, and setsof bars, from 2s. 6d. to . . Q (j O Ditto, in the shape of a horse-shoe, the strongest form, from V I5, 6d. to 1 1 O Ditto, combined to any number, from 12r. to 21 0 0 A box of magnetical apparatus, illustrating a variety of cu- rious and entertaining properties in magnetism, consisting chiefly of the following articles: a set of six artificial bar magnets 5 two horse-shoe magnets 5 six small iron balls 3 a magnetometer 5 two magnetical spinners 3 a small dip- ping needle 3 a gimbal compass 5 two brass magnet tables 3 an armed combined magnet 3 six magnetic needles, with six pointed stands 3 and sundry other illustrative and en- tertaining articles, all packed ina mahoganycase, 5/. 5r.to P p O Dipping needles,variation &other compasses, in greatvariety.

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