529 



DErGS, ITAECOTICS, ETC. 



There is no doubt that the maaure which coatains the largest 

 proportion of alkaline carbonate, magncisia, lime and gjpsiini, 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 : — 



All the ingredients ^vllieh. are 

 necessary to replace 100 lbs. 

 of the ash of tobacco leaves 

 are present in the following 

 mixture : — 

 Bone dust, sulphuric acid 23 lbs. 

 Carbonate of potash (dry) 31 „ 

 Carbonate of soda (dry) 5 „ 

 Carbonate of Magnesia 25 „ 

 Carbonate of lime (chalk) 6u 



144 „ 



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

 tobacco, by Posselt andE/Cimann 3Iag. Pharm." xxiv. xxv.) : — 



Potash 



12.14 



Soda 



0.u7 



Lime 



45.90 



Magnesia 



13.09 



Chloride of sodium 



3.49 



Chloride of potassium 



3.98 



Phosphate of iron 



5.48 



Phosphate of lime ... 



1.49 



Sulpnate of hme 



6.3J 



Silica 



8.01 





100.00 



Nicotine 



jS"icotianine 



Extractive matter, slightly bitter 

 Gum, with a little malate of hme 



Grreen resin 



Vegetable albumen 



Substance analogous to gluten 



Malic acid 



Malate of ammonia 



0 06 



0-01 



237 



174 



0-26 



0-26 



1-04 



0-51 



0-12 



Sulphate of potash 0-04 



Chloride of potassium 



Potash combir-ed vrith malic and nitric acids . . 



Phosphate oi hme 



Lime m union with malic acid 



Sihca 



"Woody fibre 



Water (traces of starch) 



0-06 

 0-90 

 0-16 

 U-24 

 0U8 

 4-96 

 87-21 



100-1 



Dr. Covell, in "Silliman's American Jouimal," vol. yii., shows 

 its components to have been but imperfectly represented in the 

 above Grerman 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 dj'e stuff, soluble only in acids ; it 

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



12, nicotianine. Accordino: to Buchner, the seeds of tobacco 



