322 



MR C. G. WILLIAMS ON THE VOLATILE BASES 



Carbon, 

 Hydrogen, 



Nitrogen, 



Experiment. 



83-29 



6-57 



10-15 



Calculation. 





83-91 C 20 



120 



6-29 H 9 



9 



9-80 N 



14 



100-00 143 



The above analysis, as regards the carbon, would be useless as evidence of the 

 existence of lepidine, because, as has been said, the 18 and 20 carbon formulae 

 only cause a difference of *2 of a per cent., but the hydrogen is so much 

 higher in lepidine, that some slight judgment may be formed from the numbers 

 obtained. 



The platinum salt of lepidine contains two per cent, more carbon, and more 

 than one per cent, less platinum than chinoline, and the analysis of that obtained 

 from the fraction boiling between 510° and 520° F. (265°, 271° C), which had 

 been rectified no less than twelve times, gave the following result, — 



f 10-265 grains of platinochloride of lepidine gave 

 12-740 ... carbonic acid, and 

 2-720 ... water. 



III. 



3-335 grains of platinochloride of lepidine gave 

 •940 ... platinum. 



9-125 grains of platinochloride of lepidine gave 



Carbon, 

 Hydrogen, 



Nitrogen, 

 Chlorine, 

 Platinum, 



11-455 



carbonic acid 



, and 









2-430 



water. 











3-330 



grains of platinochloride of lepidine 



gave 







•935 



platinum. 













Experiment. 

 I.&II. III. & IV. 





Calculation. 















33-85 



34-23 



34-36 



^20 



120 





2-94 



2-96 



2-86 



H 10 



10 









4-01 



N 



14 









30-50 



C1 3 



106-5 





28-18 



28-08 



28-27 



Pt 



98-7 





100-00 



349-2 



As a further confirmation of the constitution of lepidine, the density of its 

 vapour was ascertained with the following result, — 



Temperature of balance case, ...... 



vapour ....... 



Excess of weight of balloon and vapour over balloon and air, 

 Capacity of balloon, ....... 



Barometer, ......... 



Residual air, ......... 



58° Fah. 

 551° ... 

 10-050 grains. 

 325-5 cub. Cent. 

 29-852 inches. 

 0- 



Theoretical Density of Vapour. 

 C 20 H 9 N = 4 vols. 

 4-94 



Experiment. 



5-14 



Nitrate of Lepidine.— When the fraction boiling from 500° to 510' F. (260 c - 

 266° C.) is dissolved in nitric acid of moderate strength, a solution of a pale red 

 colour is obtained, which, on evaporation, yields a deep brownish-red deliquescent 



