Elements of agriculture and vegetation / By George Fordyce, M. D. Fellow Of The Royal College Of Physicians; Physician to St. Thomas's Hospital; and Reader on the Practice of Physic, in London. To which is added an appendix for the use of practical farmers.

  • George Fordyce
Date:
1789
Catalogue details

Licence: Public Domain Mark

Credit: Elements of agriculture and vegetation / By George Fordyce, M. D. Fellow Of The Royal College Of Physicians; Physician to St. Thomas's Hospital; and Reader on the Practice of Physic, in London. To which is added an appendix for the use of practical farmers. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    ♦ [ 6i ] found in Soils are, Their PROPERTIES. It unites with Sulphur, forming Hepar Sulpha- ris. It unites with Animal and Vegetable Subftan- ces, forming a Soap. It prevents Putrefaction. It attracts Acids ftronger than Volatile Alkali or Magnefia. If it be expofed to the Air, it attracts from it the fixable Air, and reverts to the State it was in before it was burnt. Mild Calcareous Earth, forwards Putrefaction* It is infoluble in Water. When Calcareous Earth is reduced to a Pow-- \ der, and applied to a Soil, it is apt to be wafhed through it. Cauftic Volatile Alkali will not precipitate Cal-- eareous Earth, if diffolved in an Acid; but fixe Vegetable Alkali will ■, this diftinguifhes it from- the other Earths. Vitriolic Acid will not difTolve it fo as to form a clear Solution; and if this Acid be added to a Solution of it in any other, it will make a Pre- cipitation.