256 A CHEMICAL ST LTD Y OF 



observed on treating the fixed oil with concentrated sulphuric acid, nor on the addi- 

 tion of syrupy phosphoric acid, though it was partially soluble in these acids. Phos- 

 phoric acid colored it yellow ; it was colored yellowish by concentrated hydrochloric 

 acid and nitric acid of 1.22 specific gravity. A mixture of concentrated sulphuric 

 acid and nitric acid of 1.22 specific gravity changed the color of the fixed oil to a red- 

 dish-brown; it was colored pale green by sulphuric acid of 1.634 sp. gr. and of 1.53 

 sp. gr. Calcium di-sulphide gave a bright green color reaction with the fixed oil, but 

 did not form an emulsion with it ; aqueous solutions of gold and platinum chlorides 

 were reduced by it. The fixed oil was saponified with . difliculty by alcoholic soda ; 

 but readily by boiling aqueous soda ; a white fragile soap was separated and filtered 

 from the liquid. The soap was decomposed by hydrochloric acid and the fatty acids 

 separated. The filti-ate from the soap was examined for glycerin. By the method* 

 used, an oily liquid was obtained, it was heated with anhydrous borax on platinum 

 foil, and gave the usual green-colored flame test for glycerin. The alcoholic solution 

 of the j^etroletmi sjnrit residue was fractionally precipitated with an alcoholic solution 

 of magnesium acetate, and traces of an amorphous residue were recovered.f 



The petroleum sjyirit residue was digested with water containing sulphuric acid, 

 and examined for alkaloids which are sometimes brought down Avith fixed oils. The 

 usual reagents failed to detect traces of alkaloids. 



:Extract (2), Wood of the Boot. 



The maceration was carried out under the same conditions as in extract (1). 



The extract was a clear, colorless solution, neutral in reaction. A drop of the 

 liquid left no uniform spot on blue paj)er. The extract was evaporated at the ordinary 

 temperature. The residue was light yellow- coloied, of a semi-solid consistency and 

 melted at 36°j^C. A definite volume of the extract was evaporated, dried, and weighed. 



TOTAL SOLIDS. 



Petroleum spirit reiidue dried at 100° C 0.55 per cent of solids. 



" llOOQ 0.35 



0.20 " " loss. 



The residue was identified as a fixed oil ; associated with volatile fatty acids. 

 The latter were indicated by the 0.2 per cent of loss, and the disagreeable odor of the 

 residue which was dissipated on heating at 110° C. 



The petroleum spirit residue from the extract was evaporated at the ordinary tem- 

 perature, dissolved with difliculty in cold 95 per cent, alcohol, and in boiling weaker 



*" riant Analysis." G. Draggendurir, p. 13. 

 t Loc. cit., page 10. 



