592 DRUGS, NARCOTICS, ETC. 



There is no doubt that the manure which contains the largest 

 proportion of alkaline carbonate, magnesia, nine aud gypsum, is 

 that best adapted for tobacco. 



I give an analysis taken from Prof. Johnston's " Lectures," 

 (2nd edition) of the ash of the tobacco leaf and the composition 

 of a special manure for tobacco : 



Potash 12.14 



Soda 0.07 



Lime 45.90 



Magnesia 13.09 



Chloride of sodium 3.4U 



Chloride of potassium 3.98 



Phosphate of iron 5.48 



Phosphate of lim ... 1.49 



Sulphate of lime ... 6.35 



Silica 8.01 



100.00 



AH the ingredients which are 

 necessary to replace 100 Ibs. 

 of the ash of tobacco leaves 

 are present in the following 

 mixture : 



Bone dust, sulphuric acid 23 Ibs. 

 Carbonate of potash (dry) 31 

 Carbonate of soda (dry) 5 

 Carbonate of Magnesia 25 

 Carbonate of lime (chalk) (>0 



144 



The following is the result of an analysis of the fresh leaves of 

 tobacco, by Posselt andB-eimann (" Mag. Pharm." xxiv. xxv.) : 



Nicotine 06 



Nicotianine O'Ol 



Extractive matter, slightly bitter 2 37 



Gum, with a little malate of lime T74 



Green resin 0'26 



Vegetable albumen 0'26 



Substance analogous to gluten I'Ol 



Malic acid 0'5l 



Halate of ammonia 0' 12 



Sulphate of potash 0'04 



Chloride of potassium 0'06 



Potash combined with malic and nitric acids .... 0'90 



Phosphate 01 lime 0'16 



Lime in union with malic acid 0'24 



Silica O'US 



Woody fibre 4"J6 



Water (traces of starch) 87'21 



100-1 



Dr. Covell, in " Silliman's American Journal," vol. vii., shows 

 its components to have been but imperfectly represented in the 

 above German analysis. He found in tobacco by chemical 

 examination 1, gum; 2, a viscid slime, equally soluble in water 

 and alcohol, and precipitable from both by subacetate of lead ; 

 3, tannin ; 4>, gallic acid ; 5, chlorophyle (leaf green) ; 6, a green 

 pulverulent matter, which dissolves in boiling water, but falls 

 down again when the water cools ; 7, a yellow oil, possessing the 

 smell, taste and poisonous qualities of tobacco ; 8, a large quan- 

 tity of a pale yellow resin ; 9, ^nicotine ; 10, a white substance, 

 analogous to morphia, soluble in hot, but hardly in cold alcohol ; 



11, a beautiful orange red dye stuff, soluble only in acids ; it 

 deflagrates in the lire, and seems to possess neutral properties ; 



12, nicotianine. According to Buchner, the seeds of tobacco 



