[362]. As it is very desirable to exclude the use of lead altogether, the Society for the promotion of Arts, Manufactures, and Commerce, has offered a premium for a substitute for this metallic glaze. For an account of several new glazes, as substitutes for lead, see Parkes’s Chemical Essays, vol. iii, p. 193-576.
[363]. Darwin’s Zoonomia, vol. 3, cl. 1, 2, 4, 8.
[364]. Chemical Essays, vol. v, p. 193.
[365]. Philosophical Magazine, 1819, no. 257, p. 229.
[366]. The use of the arsenic is to render the lead more brittle, and to dispose it to run into spherical drops.
[367]. Francis Citois, the historian of this celebrated epidemic, published his “Diatriba de novo et populari apud Pictones, dolore colico bilioso,” A.D. 1617. In which he states that the “dolor colicus Pictonicus” was a new epidemic in the province of Poitou, about the year 1572; and after having prevailed in that province about 60 or 70 years, it became milder, less untractable, and by degrees was translated to other parts of France. The supposition, however, says Sir George Baker, that the colic of Poitou was a new disease, about the time when Citois lived, is not true; the disease was even mentioned by our countryman John of Gaddesden, who appears to have written his Rosa Anglica early in the fourteenth century. If we consult authors posterior to Citois, we find this species of colic mentioned in almost every practical book. We have an account in Sennertus of its having prevailed epidemically, all over Silesia, in the year 1621. Baglivi even affirms that “nihil facilius colicæ supervenit, quam paralysis.” None of these authors, however, appear to have entertained the slightest suspicion of the true source of the malady.
[368]. Ephemerides Germanicæ, Ann. 4.—Observ. 60 by Cockelius.—Obs. 92 by Brunnerus.—Obs. 100 by Wicarius.
[369]. Chemical Essays, vol. 3, page 369, edit. 3.
[370]. Exam. Chy. de Differ. Subs. par M. Sage, p. 157.
[371]. Medical Transactions of the College of Physicians, vol. ii, p. 86.