The Edinburgh new dispensatory : containing, I. The elements of pharmaceutical chemistry: II. The materia medica, or, The natural, pharmaceutical, and medical history, of the substances employed in medicine: III. The pharmaceutical preparations and compositions including translations of the Edinburgh Pharmacopoeia published in 1817, of the Dublin Pharmacopoeia in 1807, and of the London Pharmacopoeia in 1815. Illustrated and explained in the languages, and according to the principles, of modern chemistry. With numerous tables / by Andrew Duncan, Jun.

  • Duncan, Andrew, Jun., 1773-1832.
Date:
1822
Catalogue details

Licence: Public Domain Mark

Credit: The Edinburgh new dispensatory : containing, I. The elements of pharmaceutical chemistry: II. The materia medica, or, The natural, pharmaceutical, and medical history, of the substances employed in medicine: III. The pharmaceutical preparations and compositions including translations of the Edinburgh Pharmacopoeia published in 1817, of the Dublin Pharmacopoeia in 1807, and of the London Pharmacopoeia in 1815. Illustrated and explained in the languages, and according to the principles, of modern chemistry. With numerous tables / by Andrew Duncan, Jun. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

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    of oxygen, or multiples of the same quantity ; and oxy- genizable bodies combine in such proportions as will require equal or multiple quantities of oxygen for their oxygenizement. e. It unites a first proportion of one body with another, more strongly than a second ; a second than a third, and so on; and hence it is in the inverse ratio of sa- turation, and seems to increase with the mass. f It is influenced by cohesion, specific gravity, elasticity and temperature. g. It is often accompanied by a change of temperature. 4. Substances, chemically combined, acquire new proper- ties ; when they disguise the properties of each other neutralization takes place; i, and cannot be separated by mechanical means. Jc, The action produced by different affinities, existing in one substance, is called Resulting Affinity, 20. Affinity is a, simple^ when two bodies unite, in consequence of their mutual attraction, whether these bodies be themselves simple or compound, and even although, in the latter case, it be attended with decomposition. h. compound^ when there is more than one new combina- tion, and when the new arrangement would not have taken place, in consequence of the attractions tending to produce either combination singly. 21. The attractions w’hichtend to preserve the original ar- rangement of bodies presented to each other are denominated Quiescent Attractions ; those which tend to destroy the origi- nal, and to form a new arrangement, are termed Divellent at- tractions. It is evident that no new arrangement can take place, unless the divellent be more powerful than the quiescent at- tractions. SIMPLE SUBSTANCES. 22. Those bodies which have never been decomposed, and which no analogy indicates to be compound, are considered to be simple substances. 23. To this class belong all the metals, certain inflamma- ble and acidifiable substances ; certain supporters of com- bustion, and the imponderable matters which pervade all na- ture. 24. Many attempts to classify simple substances have been made, but none is perfectly satisfactory. The following is that of Dr Thomson, in the last edition of his System.