A|fA^Ysi§.Q^ TP9.ACCO, l|g^j 



ployed in man u fact wring tobacco, as well as qF the teibaeco^ 

 of different mativvfactories, both French and foreign. ,. ... 



We were of opinion, on entering upon this inquiry, that Advantagee to- 

 some advantages might result from it to the manufacturej;^^"'P**^^ 

 with respect to the preparation of tobacco; or that at least 

 ^be theory of chemistry «iight derive from it some principle, 

 by means of which it could give a satisfactory explanation 

 ff the changes, that might take place in the matters -enter- 

 ing into the composition of tobacco. 



I ought here to mention, that I have been assisted in this Persons en- 

 long and laborious research by Mr. Robiquet, a very well ^^^^^ *" ^^' 

 informed young apothecary of Paris, and Mr. Warden, 

 American consul, who devotes the leisure moments afford^i^ 

 him by his office to the practice of chemistry. 



After having bruised the leaves of nicotiana latifolia in a Process, 

 rparble mortar, we wrapped them in a linen cloth, and sub-* 

 jected them to the action of the press. To separate all the 

 soluble matter they might contain, this operation was re- -. 



peated three times, with the addition of a little water, - 



Though the cloth was of a pretty close texture, the juice 

 retained a large quantity of green matter in suspension, i 



vhich was separated by filtration through blotting |>aper. V [ 



The green matter that remained on. the filter, was washed 

 and set apart, and will be notieed helreafter. .jit 



Examination of the filtered Juice, 



I. This juice strongly reddqned litmus paper, a proof The filtered 

 that it contained a free acid. juiceexa- 



i3. Oxalate of ammonia, by the copious precipitate it 

 formed, demonstrated the presence of lime, and conse- 

 quently of some calcareous salt. 



3. Nitrate of silver threw down a copious precipitate, 

 which was not wholly dissolved by nitric acid ; whence we 

 may infer, that it was partly formed by a muriate. 



4. The infusion of galls, and the mineral acids, indicated 

 by the tolerably bulky brown precipitates they occasioned, 



the existence of some animal matter, parliculdrly'^f al- ■■ - ' 



bumen. » ' - 



5. Heat raised to 80" of R. [212* F.j'confirrned this by V 

 •ccasioning a copious coagulation, " 



6. Acetate 



