24 
ee Hummel, of the Dyeing School, Leeds, was kind. 
nough to examine the colouring matter, and furnished the 
Pollo ise oe report :— 
PROF. HUMMEL TO ROYAL Lacu KEW. 
Clothworkers' Departm 
: The Yorkshire ore Leeds, 
DEAR SIR, November, 1897. 
HEREWITH enclosed I send you two pieces of calico 
Dora with iron and aluminium in a stripe pattern, and 
dyed with (a) Old Fustie (Morus tinctoria), (b) Poli hr hispidus, 
received from you 
The experiment shows that P. hispidus contains a yellow 
mordant-colouring-matter in moderate quantity, but the colours 
obtained are not bright enough, nor is the fungus mers up 
in colouring matter to render it of commercial value in Euro 
If you will be good enough to procure about 10 Ibs. weicht of. 
the fungus, it will be worth while making d chemical examina- 
tion to determine what the colouring matter 
Yours truly, 
(Signed) 3 7. HUMMEL. 
W. T. Thiselton-Dyer, Esq., F.R.S., 
Director, Royal Gardens, Kew. 
