Scientific Intelligence, Sfc. 7 1 



perature. The portion which separates is the salt. Tartrate of 

 apirin deposits by the application of heat small tetrahedral crystals. 

 The acetic acid salt, also precipitated in a crystalline state. Apirin 

 is precipitated by disacetate of lead but not by tan. 



10. jFraxi7iin. Was obtained by Keller from the bark of the 

 ash in the form of six-sided prisms, which are readily soluble in 

 water and alcohol. Buchner has given it the name of Fraxinin, 

 It is prepared in the same way as salicin. 



11. Veratrin. This alkaloid may be prepared by treating the 

 alcoholic extract w ith sulphuric acid, and the solution with the in- 

 cinerated matter of blood, by which means the veratrin will be pre- 

 cipitated with the alkali. From one French pound, about 72 grains 

 can be procured. This should be dissolved in dilute sulphuric acid, 

 and nitric acid poured into the solution as long as a black precipi- 

 tate falls. The solution should be filtered, then precipitated with a 

 very dilute solution of potash ; the precipitate should then be well - 

 washed and again dissolved in anhydrous alcohol. On evaporation 

 a yellowish mass remains. This contains besides veratrin, 1st a 

 new crystallizable base. 2nd, An uncrystallizable base. 3rd, A 

 neutral substance. To separate them the mass should be boiled with 

 water which leaves the veratrin and nonbasic matter undissolved; 

 ether dissolves the veratrin and leaves the latter. The veratrin 

 should then be combined with sulphuric acid and crystallized in long 

 needles, by spontaneous evaporation. 



The composition of veratrin has been found to be carbon 71*48. 

 Azote 5*43. Hydrogen 7*67. Oxygen 16-42. The atom has been 

 fixed at 36*44 by one party, and at 34*18 by another. So that we 

 may estimate its atom at 35*25. 



12. Loheline. Has been extracted from the leaves of the Lobelia 

 injlata^ by Mr. M. S.[Calhoun, by treating them with water acidu- 

 lated by muriatic acid, concentrating the liquid, and agitating with 

 alcohol which separates the earthy matter, and dissolves the active 

 principle. By evaporating the alcohol, the lobeline is obtained. It 

 is a soft almost fluid substance resembling nicotine. Its taste is acrid. 

 It is very soluble in alcohol ; scarcely so in ether. Charcoal scarcely 

 removes the colouring matter. It forms salts w^ith acids ; the nitrate 

 is dilequescent, and so are the sulphate and muriate. — (^Philadelphia 

 Journal, January 1834. 



13. Powder of Cubehs. Monheim finds in 1000 parts of cubebs. 



Cerumen 30 



Green volatile oil 25 



Yellow „ 10 



Cubebin 45 



Resinous balsam 15 



Chloride of sodium 10 



Extractive 60 



Lignin 650 



Loss 155 



1000 



