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Instruction book, for set of specific gravity beads

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Instruction book, for set of specific gravity beads
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This instruction book was printed in Edinburgh in 1805. It is for a set of specific gravity beads made in Edinburgh by Isabella Lovi, the widow of a scientific instrument maker, Angelo Lovi, who emigrated to Scotland from Milan in 1772.

Mrs Lovi patented her improvements to the glass 'philosophical bubbles' in 1805, and issued this short book entitled 'A short introduction to the use of the Patent Aerometrical Beads; with some remarks on other instruments that have been employed to ascertain the strengths of spirituous liquors.'

The set features 363 specific gravity beads, together with two slide rules, a thermometer, six glass rods and this instruction book. The set could have been used for a variety of purposes: from ether to concentrated sulphuric acid, which is why there are so many individual glass 'beads', each marked with their respective specific gravity. The Highland Society of Scotland were keen to see it applied to testing the quality of milk, and awarded Mrs Lovi a premium in 1816.

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