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.

  • Lewis, William, 1708-1781.
Date:
July 1805
Catalogue details

Licence: Public Domain Mark

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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    Galvanism. 80. The phenomena ofgalvanifm feem to depend folely on the agency of ele&ricity, excited during certain chemical actions. 81. The galvanic fluid is excited by arranging at leaft three heterogeneous bodies ; for inftance, two metals and a fluid, in fuch a manner that the two metals be in direct contact with each other in one part, and have the fluid interpofed between them in an- other. 82. The pile of Volta, by which it is rendered mod manifeft, is conftructed, by combining a ferics of Ample galvanic arcs (81) into one continuous circle, in one uniform order of arrangement. 83. The folids capable of exciting galvanifm, are the metals and charcoal ; and the moft efficient fluids are certain {aline folu- tions. 84. The effects of the fimple galvanic circle (81.) on the ani- mal body, are the production of a fenfation of light when applied to the eye ; of an acid tafte on the tongue ; and the excitement of the mufcles through the medium of the nerves. 85. The pile, when well conftructed, befides thefe effefts, alfo gives a fhock and fpark refembling thofe of electricity (72.) and proves, that the galvanic action is always accompanied by the decompofition of the fluid, and a combination of one of its con- ftituents with one oi the metals. Magnetism. 86. If an oblong piece of iron be fufpended freely, it will af- fume a determinate pofition with regard to the axis of the earth. 87. When the fame end always points in the fame direction, it is faid to poffefs polarity, or to be a magnet. 88. The fimilar poles of two magnets repel each other ; and the diffimilar poles attract each other with a force decreasing as the diftances increafe. 89. Any piece of iron, when in the neighborhood of a mag- net, is a magnet ; and its polarity is fo difpofed, that the magnet and iron mutually attra£t each other. 90. Magnetifm does not feem to affect fenfibility or irritability, or to influence chemical action. Salifiable Bases. 91. The great bulk of this globe confifts of earths and flones. Although thefe vary infinitely in their external chara&er and phyfica'l properties, they are found to confift of a very lew fub- ftances, mixed together indifferent proportions, and modified by external agents.