641 



Band I: 2 — about 640 

 „ II: 2 — 604 - 585 

 „ III: 2 - 576 — 558 

 „ IV: 2 - 531 — 518 



Scatocyanin possesses according to Schunck a very différent 

 spectrum in acetic acid solutions. According to him the first band 

 of scatocyanin is placed on the D line. the fourth just behind E 

 and between them are still two. more or less well marked, bands, 

 a spectrum distinctly différent t'rom that of phylloerythrine. 



Under the influence of hydrochloric aeid the spectrum and colour 

 of an acetic acid solution of phylloerythrine undergoes a very cha- 

 racteristic change. The colour turns bluish violet and if sufficientlv 

 diluted, the solution causes four bands in positions which differ 

 widely from those oecupied by the original bands. In the orange 

 we have now two narrow faint bands. behind the sodium line a broad 

 dark band and finallv in the green a badly defined faint band, 

 The positions of these bands are: 



Band I: 2 — 625 — 615 

 „ II: 2 — 615 — 606 

 „ III: 2 — 584 — 556 

 „ IV: 2 — about 536 the less refrangible side. 



In concentrated solutions the two first bands unite into one. the 

 second draws closer towards the Na line and the fourth appears 

 more distinct. 



Concentrated sulphuric acid dissolves phylloerythrine with a grass 

 green colour and the solution causes several badly defined bands. 

 except the first in the red which is well developed. In this respect 

 phylloerythrine reminds one of scatocyanin. As regards the absor- 

 ption of light of shorter wave length. I found that very dilute 

 chloroformic solutions of phylloerythrine cause two bands, one in 

 front of fcß, the otber behind the latter line and on diluting still 

 more this second band in the more refrangible part disappears 

 altogether. (Plate XVI). 



The chemical properties of phylloerythrine unfortunately could 

 not be investigated closely for want of a sufficient quantity of the 

 substance. I have onlv been able to ascertain that despite its in- 

 solubitity in alkalies phylloerythrine forms Compounds with salts of 



