S2 ARTIFICIAL TAN". 



Hquor changed to a reddifli-brown, a coagulum of the faniij 

 colour fubtided, the odour of fulphureous acid gas was imme- 

 vAn odour diately annulled, and was fucceeded by one which much re- 



fike^oils oHa- fumbled a mixture of oils of lavender and pepperraint, 

 vender and pep- The whole was then diftilled gradually, when the water 

 pernaint. (>ame over impregnated with the odour laft mentioned, accom- 



panied by a yellowith oil, which floated oi) the top, and was 

 computed to amount to three grains. 



B. When the whole of the water had come over, there was 

 again a (light production of the fulphureous acid gas; two 

 ounces of water were then added, and the diftillation conti- 

 nued (without the recurrence of the former odour) till a dry 

 blackifti brown mafs remained ; this mafs was well waflied 

 with warm diftilled water, by which nothing was extracted; 

 but two ounces of alcohol digefted on it for 2 1 hours formed a 

 very dark, brown tinflu re. 



The refiduum was digefted with two ounces more alcohol, 

 and the procefs repeated till the alcohol ceafed to a61. 



The refiduum had now the appearance of a compaft fort of 

 coal in fmall fragments, which were well dried, and after 

 being expofed to a low heat in a clofe velTel, weighed fifty- 

 three grains. 



C. From different portions of the alcohol folulion, added 

 together and diflilled in a water bath, a blackifli brown fub- 

 ftance was obtained, which had the appearance of a refin oc 

 gum with a flight odour of caromel, and weighed 49 grains. 



The produdls obtained from the 100 grains of camphor 

 treated with fulphuric acid, were, — 



Grains. 



_ . -. - A. An effentlal oil, having fomewhat of an odour 



Products fiom r / 



wmphorandful- of a mixture of lavender and peppermint, about 3 



yhuric acid. ^ ^ compad and very hard fort of coal, in fmall 



fragments, - - - - '■ 53 



C. A blackifli-brown fubftance, of a refinous ap- 

 pearance, - - - - - 49 



105 

 The increafe of weight of five grains is attributed partly to 

 water retained by the laft fubflance, and partly to oxigen 

 united to the carbon. 



The fubllance C had the following properties : 



l.It 



