Tracts.

£8,750 · Offered by Shapero Rare Books

'important milestone in the history of the theories of chemical combinations' A rare sammelband, containing the first editions of two collections of tracts by the natural philosopher and founding fellow of The Royal Society, Robert Boyle (1627-1691). Comprising eight essays in total covering important milestones in the advancement of natural science from observations on astronomy and the voyages of discovery that had taken mankind to new remote regions of the world, to the description of experiments on the problem of rendering seawater fit for human consumption. In particular, Boyle's account of 'local motion' in his essay on Cosmicall qualities made important advances in his corpuscular theory of matter, reaffirming the break he first made with classical Aristotelian notions of the four elements in the Sceptical chymist. Assuming the existence of different 'simple' elements and the occurrence of various combinations of their corpuscles in differing states of 'local motion', Boyle's theory was able to account for the existence of all natural phenomena (Fulton). Also of note are Boyle's descriptions of an 'Engin' invented by a Swedish scientist that had allowed him to remain for several hours at great depths in the sea, and his observations on the change of colour of vegetable extracts when their reaction is changed from acid to alkali. 'One of the important milestones in the history of the theories of chemical combinations' (Fulton). First editions, complete; 8vo (17.5 x 12 c

• Binding: Hardcover

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