\64t DR. LtiWlG on THE ESSEKTIAL OIL 



slightest alkaline reaction is visible. All these experiments s^em to coti- 

 firm the above-mentioned view, that chloride of spiroil combines with- 

 out decomposition with the bases of salts. 



The question may here be asked, whether the acid properties of the 

 chloride of spiroil arise from chlorine, and whether such a chloracid (in 

 the same way as oxyacids) could combine with them ? 



Till now no such combinations were known, and therefore perhaps it 

 might be simpler to state that when chloride of spiroil is brought toge- 

 ther with a metallic oxide, 4 eqs. of a metallic chloride and 1 of a spiroilate 

 are formed. If an acid be added to the solution of these salts, chloride 

 of spiroil is again thrown down and a corresponding metallic salt form- 

 ed. In the same manner one may imagine double combinations, con- 

 sisting of a metallic chloride and a salt of a bromacid, from which on 

 the addition of another acid chloride of bromine might be separated. 

 0'327 grm. of fused chloride of spiroil yielded 



0*593grm, carbonic acid = 162-94' carbon. 

 0-099 water = 10-98 hydrogen. 



0-327 gnii. chloride of spiroil dissolved in potash entirely free from 

 chlorine, the solution evaporated, and the dry residue heated in aplatinum 

 crucible yielded, after the mass which had been heated was dissolved in 

 water and saturated with nitric acid, 0-306 fused chloride of silver = 

 • f754i chlorine. 



Carbon 162*94 49-83 



Hydrogen 10-98 3-35 



Oxygen 77-68 23-77 



Chlorine 75-40 23-05 



327-00 100-00 



1 eq. of chloride of spiroil therefore consists of 



12eqs. carbon 73-56 50-38 



5 — hydrogen 5*00 3-42 



4 —.oxygen 32-00 19-36 



1 —chlorine 35-47 26-84 



146-03 100-00 



It has been stated that 0-628 grm. hydrospiroilic acid contained 0-795 

 chloride of spiroil. According to the established eq. 111-56 hydro- 

 spiroil should yield 146-03 chloride of spiroil: 



11-56 : 146-03 = 0-628 : 0*790. 



Bromide of Spiroil. 

 Bromide of spiroil is easiest obtained by pouring bromine upon hydro- 

 spiroilic acid in a deep glass : hydrobromic acid is immediately evolved, 

 the mixture becomes perceptibly warm, and at last solidifies into a 

 greyish white crystalline mass. Bromide of spiroil may also be easily 



