on Green Leaves and other Parts of Plants. 173 
Fig. 7, crystals of anilophyll are formed, and radiate from 
the brown masses which become somewhat paler ; the other 
appearances as before. 
In the ‘ Chemistry of Chlorophyll ’ it is stated that etiolated 
leaves do not yield anilophyll on treatment with aniline. This 
statement was not confirmed by later experiments. On taking 
equal quantities of normal green and of etiolated ivy leaves, 
and operating in the usual manner, we obtained from the latter 
quite as much as from the former, and the product from the 
etiolated leaves was moreover more easily purified than that 
from the green leaves, being less contaminated with amorphous 
matter. Having obtained so favourable a result from etiolated 
leaves, we were not much surprised when we found that other 
parts of plants, such as petals, underground stems, &c., also 
gave anilophyll on treatment with aniline. These other parts 
of plants were found to differ in this respect inter se just as 
green leaves do, i.e. some reacted rapidly and well, others 
more slowly, others not at all. In the case of petals, colour 
seemed to afford no clue to the amount of reaction ; some 
yellow petals, such as those of the yellow chrysanthemum and 
yellow dahlia, reacting well, others not so well ; some white 
petals being extremely sensitive, others not, just as some 
tubers give a decided reaction, others next to none. The 
white flowers of Sambucus nigra , devoid as they are of chloro- 
phyll and other colouring matters, are rapidly turned brown 
by aniline, and give a good yield of anilophyll — 50 grams, of 
these flowers giving in one experiment 0*0493 grm. of pure 
anilophyll, a larger amount than is obtained from some green 
leaves which react well with aniline. Among blue flowers we 
may mention those of Aconitum Napellus , which give a very 
good yield of anilophyll. The crystals of the latter formed in 
the cells of the sepal are very distinct, and form an interesting 
object under the microscope (Figs. 8, 9). The hairs of the 
sepal are especially active in the formation of anilophyll ; in 
some instances they retained their purple colour, though a 
considerable amount of anilophyll had crystallised out, in and 
on the protoplasm. 
N 2 
