Newton, Sir Isaac. See vol. ii., p. 241.

Philosophies naturalis principia mathematica, completed in July of 1687. The first edition was exhausted in a few months. There are several translations, among others one by Andrew Motte, New York, 1848.

Paracelsus. See vol. ii., p. 159.

The Hermetic and Alchemical Writings of Paracelsus, trans, by A. E. Waite, 2 vols., London, 1894. Pascal, Blaise. See vol. ii., p. 122.

Récit de la grande expérience de Vêquilibre de liqueurs, Paris, 1648.

Sawtree, John. See vol. ii., p. 124 ff.

Of the Philosopher's Stone, London, 1652. Swammerdam, John. See vol. ii., p. 297.

Bibel der Natur, trans, into German, Leipzig, 1752. Sydenham, Thomas. See vol. ii., p. 189.

His first work, Methodus curandi febres, was published in 1666. His last work, Processus integri, appeared in 1692. His complete works, in Latin, were published by the Sydenham Society, London, 1844, which published also an English translation by Pr. R. G. Latham in 1848. There are several other English translations.

Torricelli, Evanoelista. See vol. ii., p. 120.