Schunck—The Chemistry of Chlorophyll. 109 
but is yellower at the edges ; they show no absorption-bands. 
Anilophyll is slightly soluble in boiling concentrated hydro- 
chloric acid, giving a solution of a fine violet colour without 
absorption-bands. It dissolves easily in concentrated sulphuric 
acid in the cold, giving a dark-red solution which on the 
addition of more acid shows about the same colour and the 
same amount of absorption as the ethereal solution ; on the 
addition of water the solution gives no precipitate and remains 
red, but after some time it acquires a fine violet colour like 
that of an alkaline solution of alizarin, and now shows a broad 
ill-defined absorption-band in the orange, with much obscu- 
ration in the green, but very little in the blue and none in the 
red. On raising the solution in sulphuric acid to the boiling- 
point and boiling some time no decomposition seems to take 
place, the solution remaining red and giving as before no 
precipitate with water. On treatment with strong nitric acid, 
anilophyll dissolves affording a bright red solution, which on 
boiling gives off only a trace of nitrous fumes, and on evapo- 
ration leaves an amorphous, red, resin-like residue, which is 
probably a nitro-compound, since it differs in some respects 
from the original substance. Anilophyll is totally insoluble 
in caustic alkalis, the crystals remain quite unchanged on 
boiling and the liquid acquires no trace of colour; the ad- 
dition of zinc powder to the boiling lye is quite without effect, 
no sign of reduction or of consequent solution being observ- 
able. On treating anilophyll with fusing potassium hydroxide 
and continuing to heat for some time, no apparent change 
occurs, the residue left after washing away the excess of 
alkali being insoluble in water. The substance is however 
not quite the same as it was, for after treatment with the 
melting alkali it has become easily soluble in alcohol, giving 
a bright red solution, which on evaporation leaves an amor- 
phous red residue with a slight golden lustre ; the solution 
shows no absorption-bands. 
It appears therefore that, by the action of aniline on chloro- 
phyll, more especially the chlorophyll of living plants, a sub- 
stance is formed which no longer shows, even in a modified 
