336 REPORT—1899. 
Quinoline.—Specimen I.1 
(Prepared from Coal Tar.) 
129 gram in 20 c.c. alcohol. 
With 5, 4, 3, 2, and 1 mm. the spectrum is continuous to 1/d 3080. 
129 gram in 100 c.c. alcohol. 
With 5, 4, 3, 2, and 1 mm. the spectrum is continuous to !/\ 3151. 
129 gram in 500 c.c. alcohol. 
With 5 mm. an absorption band (1) appears from 1/A 3151 to 3890. 
With 4 mm. the same band and two additional bands are seen, e.g. (2) 
from !/\ 3242 to 3297, and (3) from 1/\ 3297 to 3537. 
With 3 mm. the absorption band (3) has disappeared. With 3, 2, and 
1 mm. we have the absorption bands (1) from '/A 3187 to 3228, and (2) 
from !/\ 3242 to 3290. 
129 gram in 2500 c.c. alcohol. 
With 5 mm. all the absorption bands had disappeared and the spectrum 
was continuous to 1/A 4248. 
Quinoline Hydrochloride.—Specimen I. 
‘129 gram quinoline+ HCl. in 20 c.c. alcohol. (HCl. was added until 
the solution gave an acid reaction.) 
With 5, 4, 3, 2, and 1 mm. the spectrum was continuous to !/A 2803. 
With 3, 2, and 1 mm. there was a feeble prolongation to 1/A 2887. 
129 gram+ HCl. in 100 c.c. alcohol. 
With 5 and 4 mm. the spectrum is continuous to !/\ 2887. With 3, 
2, and 1 mm. an absorption band appears from !/d 2941 to 3647. 
129 gram+ HCl. in 500 c.c. alcohol. 
With 5 mm. an absorption band appears from !/A 3008 to 3647. 
This is persistent until a thickness of 2 mm. is reached, the band getting 
narrower as the thickness of the layer is reduced. With 1 mm. the band 
has disappeared and the spectrum is continued to !/A 4130. 
129 gr. quinoline+ HCl. in 2,500 c.c. alcohol. 
With 5 mm. the spectrum is continuous to 1/A 4136. With 4, 3, 2, 
and 1 mm. a new absorption band appears from 1/A 4136 to 4547. 
Quinoline.—Specimen II. 
(Prepared synthetically by Skraup's reaction.) 
*129 gram in 20 c.c. alcohol. 
With 5, 4, 3, 2, and 1 mm. the spectrum is continuous to '/A 3080. 
129 gram in 100 c.c. alcohol. 
With 5, 4, 3, 2, and 1 mm. the spectrum is continuous to '/A 3080. 
‘129 gram in 500 c.c. alcohol. 
With 5 mm. an absorption band appears from !/\ 3151 to 3890. 
With 4 and 3 mm. this band is seen, but it gets narrower as the thickness 
of the layer of liquid is reduced. With 2 mm. the absorption band has 
disappeared and the spectrum extends to 1/ 4130. 
Piperidine. 
085 gram in 20 c.c. alcohol. 
With 5 mm. the spectrum extends to '/A 3970, and with 1 mm. to 
1/\ 4130. 
No absorption bands. 
1 See also Zvans. Chem. Soc, February 1882. 
