On the Fruits and Seeds of Rhamnus . 1 7 
No. d. Endosperm and embryo — as clean as possible, but 
cannot be sure of their purity. 
(In two days turbid and dirty-white from Bacteria, &c.) 
No. e. A few drops of No. a (i. e. aqueous extract of testa) 
were added to the clear solution H (i. e. boiled aqueous 
extract of pericarps). 
The No. a solution had been prepared ij hours; the H 
solution two days ; the transparent yellow solution yielded a 
dense yellow precipitate during the next hour. Other portions 
of H remained clear for two days 1 . 
No. /. To another sample of the yellow solution H, I 
added a few drops of No. c (i. e. aqueous extract of clean 
endosperm, 1^ hours old). 
No precipitate was formed. 
No.^. Another sample of H was allowed to stand for forty- 
eight hours. 
No precipitate formed. 
The following series of experiments were made with parts 
of seeds which had been kept dry for two years : — 
Series IV. 
No. 1. Glycerine (pure) extract of embryos only. 
Slowly formed a yellow clear solution which remained clear 
for days. 
No. 2. Aqueous extract of embryos only. 
At once formed a yellowish solution. It remained clear for 
twenty-four hours, but flocculent clouds appeared in two 
days 2 . 
No. 3. Aqueous extract of the thickened inturned margins 
of the seed. 
At the time I thought this consisted of the testa only, but 
pieces of the raphe were also attached. 
1 This apparently again shows that the ferment is in the testa ; but see below. 
2 Bacteria. 
C 
