30 
(retired) J. E. T. Aitchison, C.LE., F.R.S., who states there they 
-are largely used as a dye-stuff in Kashmir. They were submitted to — 
J. J. Hum men Esq., Professor of Dyeing in the Yorkshire College, 
Leeds, who has very kindly tünishod the de report. of 
the plant rhetor for dyeing or tanning is not indicated in Watts? 
Dictionary of the Economic Products of India, 
Proressor Hummer to ROYAL GARDENS, Kew. 
The Yorkshire College, Leeds, 
DEAR Sir, December 20th, 1895. 
CLOSED I now send you samples of NA printed with 
aluminium and iron ence and dyed with roots of Geranium 
wallichianum from Kashm The dark greys arin by the iron 
mordants, and the pale soiled ydlowish tints on the aluminium mordants, 
show that these roots contain ven tannin matter unaccompanied 
by any mordant-dyeing colouring matter. The reddish stain on the 
unprinted, i.e., unmordanted, parts of the calico indicates that there is 
nt some red colouring matter for which cotton has a "ES. 
attraction, but which must be regarded as of no commercial importanc 
indeed regarding the roots as a useful tannin matter the presence of this 
red — matter is somewhat objectionable. 
mparison with Sumach and Myrabolans, patterns dyed with 
iid: are also enclosed, it would appear that the G. walli libus 
roots are about equal to the latter as regards amount of tannin matter 
present, and I have no doubt they’ could be oeil employed by the 
dyer for certain purposes either in the form of powder or as an extract, 
. inthe same manner as other tannin matters are employed. 
I enclose Mr. Proctor's report which gives an analysis of the root, and 
some remarks as to its suitability for tanning leather, a sample of which 
tanned by the produet aecompanies his report. 
Yours truly, 
(Signed) J.J. Hii: 
W. T. Thiselton-Dyer, Esq., G.M.G., C.LE., 
Director, Royal Gardens, Kew. 
[ Enclosure. | 
Leather EE Laboratory, 
rkshire College, Leeds. 
DEAR rim i HUMMEL, December 14th, 1895. 
The following a: the results of our analysis of the root of 
Kao-ashud (eise: y wallichiana) which was sent by Dr. J. E. T. 
Aitchison to the Museums of Econom edema t Kew. The sample 
of root contains 43°5 per sepe of ties soluble in water and, dime 
mined by the gravimetrie hide powder method, gives— 
Tanning matter HR Aee des €. 7. 29 ¢ per Cone. 
Soluble 1 non-tanning m oat OSs 
Vegetable fibre — insoluble > ~ BOU 3$ 7 
Moisture - - - 13:6 
_ The colour. of a extract is somewhat dark and iiie but that of 
tanned with it is much brighter than RC ve been expected 
from the k Sppaeennee nce of the liquor, and there certainly oles no reason 
