970 SOME NEW BASES OF THE LEUCOLINE SERIES. 




“Trans. R.S.E.,” vol. xx. part 2 page 247 ; and Dewar, “ Proc. Royal Society al 
No. 179, 1877, remark that a wide range must be allowed in the fractional 
distillation of these and the chinoline series, or that the same base is found 
extended through several fractions. iy 
I hope to be able to continue the investigation on a considerably larger 
quantity of material, when it will be possible to continue fractional distillation 
at least 25 or 50 times, and also to complete other points in the examina- 
tion of the chemical and physical properties of these bases, which, in this paper, 
time has not allowed of. 3 
These bases, when recently distilled, are nearly colourless, and rapidly 
darken when exposed to the air; they have the same sooty smell as the first 
three of the series, though not nearly to the same degree ; they give no blue 
colour with amyl-iodide and caustic potash, proving them to be members of 
the leucoline, and not of the chinoline, series. : 
I have much pleasure in acknowledging the valuable assistance rendered by 
Mr L. Jounstone and Mr W. Goopwin in the fractional distillation of these 
bases. > 
a ne Cott Bart tee ree 
