The Life, Times, and Scientific Labours of the Second Marquis of Worcester / To which is added a reprint of his Century of Inventions, 1663, with a Commentary thereon.

by Henry Dircks

Footnotes

[2]a person.

[3]numeration and substraction. MS.

[An arithmetical Instrument.] There is in the British Museum a manuscript description, with a large engraving, of the serpentine scale invented by Thomas Browne, of Fenchurch Street, London, in 1631, by means of which “instrument all kinde of questions in Arithmetike, Geometry, &c. are speedily resolved.” Brit. Mus. Birch MS. No. 4407.

Sir Samuel Morland, in 1672–3, published a small treatise, being—“The description and use of two arithmetick Instruments;” a second title mentions, “A new and most useful Instrument for Addition and Substraction of pounds, shillings, pence, and farthings,” which he “invented and presented to his most excellent Majesty, Charles II. 1666.”

85.

A little Ball made in the shape of a Plum or Pear,[4] being dexterously conveyed or forced into a bodies mouth, shall presently shoot forth such and so many Bolts of each side and at both ends, as[5] without the owners Key can neither be opened or[6] filed off, being made of tempered Steel, and as effectually locked as an Iron Chest.

Footnotes

[4]which being.

[5]as that.