The Edinburgh new dispensatory : containing, I. The elements of pharmaceutical chemistry : II. The materia medica ... : III. The pharmaceutical preparations and compositions : including complete and accurate translations of the octavo editionof the London pharmacopoeia, published in 1791 : Dublin pharmacopoeia, published in 1794 : and of the new edition of the Edinburgh pharmacopoeia, published in 1803 : illustrated and explained in the language and according to the priciples of modern chemistry : with many new and useful tables, and seveal copperplates, explaining the new system of chemical characters, and representing the most useful pharmaceutical apparatus / by Andrew Duncan, Jun. M.D.

William Lewis

Date:: July 1805

Credit: The Edinburgh new dispensatory : containing, I. The elements of pharmaceutical chemistry : II. The materia medica ... : III. The pharmaceutical preparations and compositions : including complete and accurate translations of the octavo editionof the London pharmacopoeia, published in 1791 : Dublin pharmacopoeia, published in 1794 : and of the new edition of the Edinburgh pharmacopoeia, published in 1803 : illustrated and explained in the language and according to the priciples of modern chemistry : with many new and useful tables, and seveal copperplates, explaining the new system of chemical characters, and representing the most useful pharmaceutical apparatus / by Andrew Duncan, Jun. M.D. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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64. The fources of light are the fan's rays, combuftion, heat, and percuffion. Electricity. 65. The particles of the electric fluid repel each other, with a force decreafing as the diftances increafe. 6' . They attraft the particles of other bodies, with a force de- creafing as the diftances increafe ; and this attraction is mutual. 6y. They are difpeVfed in the pores of other bodies, and move with various degrees of facility through different kinds of matter. a. Bodies, through which they move without any perceiva- ble obftruction, are called Noneleclrics. b. Bodies, through which they move with very great diffi- culty, are called Electrics. 68. The phenomena of electricity arife a. from the actual motion of the fluid from a body contain- ing more into another body containing lefs of it ; I. from its, attraction or repulfion, independently of any transference of fluid. 69. By rubbing electrics on each other, the diftribution of the ele6tric fluid in them is altered. On feparating them, the one contains more, and the other lefs, than the natural quantity ; or, the one becomes pofitively, and the other negatively, electrified. 70 Electrics may alfo be excited by rubbing them with non- electrics. 71. If a body B be brought into the neighborhood of an elec- trified body A, B becomes ele6lrified by pofition. 72. If a body B be infulated, that is in contact with electrics only, when brought into the neigborhood of an electrified body A, a fpark paffes between them, accompanied by noife. B be- comes permanently electrified, and the electricity of A is dimin- ifhed. 73. When a body A has imparted electricity to another body B, they repel each other, unlefs B fhall have afterwards imparted all its electricity to other bodies. 74. Bodies repel each other when both are pofitively or both negatively electrified. 75. Bodies attract each other, when the one is pofitively and the other negatively electrified. 76. If either of the bodies be in the natural Mate, they will nei- ther attract nor repel each other. 77. The fpark (72.) is accompanied by intenfe increafe of tem- perature (39.) and will kindle inflammable bodies. 78. It produces-very remarkable chemical effects, depending chiefly on fudden and momentary increafe of temperature, ar.d on the light produced. 79. Electricity a.ls on the living fyftem as a ftimulus.

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