[743] De docimasia vini lithargyrio mangonisati. Tubingæ 1707.
[744] De la Mare, Traité de la Police, i. 615.
[745] William Graham’s Art of making Wines from Fruit, Flowers and Herbs. Sixth edit. London, 8vo.
[746] [A solution of sulphuretted hydrogen answers much better.]
[747] Anleitung zur Verbesserung der Weine in Teutschland, p. 32.
[748] Lib. xiv. cap. 20.
[749] [It acts by keeping the wine from contact with oxygen, which is essential to the acetic fermentation.]
[750] This was done at Rothenburg on the Tauber in 1497. It was ordered that half an ounce of pure sulphur should be employed for a cask containing a tun of wine; and that when wine had been once exposed to the vapour of sulphur, it should not undergo the same operation a second time.
[751] In John Hornung’s Cista Medica, Norimbergæ 1625, there are two letters from German physicians (Libavius and Doldius) respecting this practice.
[752] Geopon. p. 486, 502.—Lemnius de Miraculis Occultis Naturæ, Coloniæ, 1581, 8vo, p. 291.