vy Means t)fa particular Apparatus. 303 



by the nitric acid, vitrified, redissolvcd, and reduced by 

 evaporation to the consistence of' honey. 



I afterwards placed upon the tubulure of the retort an in- 

 strument of glass, which may be called the reservoir, of an 

 oblong form, open at both extremities, each of which may 

 be made perfectly air-tight by means of a stop-cock. From 

 the lower extremity issued a tube which descended to the 

 bottom of the retort, and entered into the phosphoric acid. 

 The upper extremity surmounted by a funnel, the commu- 

 nication between which and the reservoir might be inter- 

 rupted, had also a smali aperture with a ground stopper, in 

 order to let out the air when it was displaced by a liquid. 

 (See Plate IX. Fig. 3.) 



The apparatus being thus arranged, carefully luted, and 

 the first receiver cooled bv a mixture of ice and sea salt, 

 afire was lighted under the retort, increasing it gradually so 

 as to heat the acid to 95 degrees of Reaumur. Five hundred 

 grammes of alcohol at 40 degrees were then introduced into 

 the reservoir, and, by means of the lower stop-cock, drawn 

 drop by drop through the phosphoric acid warm and liquid. 

 The mixture took place with great effervescence : it was 

 coloured black, and abundant streaks immediately covered 

 the arch and neck of the retort. 



The fire was kept up, and distillation continued to dryness : 



There passed into the bell-glass : 



1. One hundred and twenty grammes of alcohol feebly 

 etherized. 



2. Two hundred and sixty grammes of a white light liquor, 

 of a lively smell, and much more etherized than the lirst. 



3. Sixtv grammes of water saturated with ether, and on 

 which four grammes of a lemon-coloured fluid floated of an 



to 



cmp\ reumatic smell, very analogous to that which corner 

 after the sulphuric ether, and which is commonly distin- 

 guished undcr4he name of sweet oil of wine. 



4. Another liquid of a foetid insupportable smell, redden- 

 ing turnsole tincture, and uniting with cfTcrvescence with 

 the carbonate of potash. This combination evaporated to 

 dryness was a deliquescent scaly wh, perfectly resembling 

 acetate of potash. 



Lime- 



