im Tin Vessels, and glazed Pottery. 315 



without being sweet, astringent, or bitter, it occasioned in 

 the throat a very uneasy and disgusting sensation, and no 

 doubt a small dose of it would have excited vomiting. 



2d, A plate of" the same alloy, of four inches' surface, 

 boiled half an hour in vinegar, lost 16 grains of its weight. 



3d, Vinegar being boiled in a vessel tinned with the 

 same alloy, acquired the same taste as No. 1. 



4th, A plate of the same alloy, exposed cold in distilled 

 vinegar, exhibited the same phEenoniena as No. 1 and 3. 

 This solution, when attentively examined, did not exhibit 

 an atom of tin. 



All these facts, which confirm those of the French aca- 

 demicians, prove that zinc is a metal exceedingly soluble 

 in vinegar, very easily altered, and that solutions of it hav- 

 ing been found noxious, it ought to be proscribed from our 

 kitchens. 



The subject of the third paragraph is the project of 

 M. Doucet, who in 1778 presented to the Academy of Sci- 

 ences at Paris a bar and pan made with a mixture of his 

 invention. It was examined by Macquer and Montigni, 

 who made a report on it. These two chemists, having 

 more experience than Hellot and GeofFroy, analysed it che- 

 micallv, and, having soon found that it had its inconveni- 

 ences, it was rejected. 



The alloy of Chart ier, and the project of Lafolie, shared 

 the same fate, as is seen by the report of the commissioners, 

 and by the labours of the abbe Mongcs and of Bayen. 



The allov of M. Buschaendorf, ofLeipsic, presented in 

 1802, and described in the Annnles des Arts et Mamtfac- 

 t?ires, forms the subject of the last paragraph. Proust sub- 

 jected it to the same experiments as the preceding: he 

 proves that it is attended with the same inconveniences, 

 without having any of the qualities announced by Buschaen- 

 dorf. 



Part II. 



On the old Method of Tinning. 



This part consists of ten paragraphs. M. Malouln, 

 while he proposes his mixture, does not condemn the old, 

 but he mentions the dangers to which people are exposed 

 by this kind of tinning. Kemcrlin, Hellot, Geotfroy, 

 Doucet, Chartier, Lafolie, Buschaendorf, and others, have 

 done no more : but no one has hitherto proved the reality 

 of these supposed dangers ; and what is still more astonish- 

 ing is, to see the inactivity of tlie chemists of Europe in 

 realising or exploding a fact which is so interesting to so- 

 7 " ciety. 



