Part IV. 1 Puran Singh : Preparation of Tannin Extracts. £i 
of 18 tons of Mangrove and Myrabolam Extract. 
Tannin 
on the 
dry 
material. 
By whom reported. 
Tintometer colour 
measurement on 
solution of *5 per 
cent, in 1 cm. cell. 
Remabks. 
Per cent. 
Red. 
Yellow. 
79-35 
Professor Procter 
26*9 
45-6 
Professor Procter remarks 
that the extract is good 
in strength but the 
colour seems somewhat 
darker, especially in 
yellow than the com¬ 
mercial ones. This is 
no doubt due to darken¬ 
ing in concentration. 
81-52 
Dr. Gordon Parker to 
Forest Chemist. 
24-2 
35-8 
72 ; 34 
Dr. Gordon Parker to 
Messrs. Rink Bros., 
London. 
170 
33-0 
73*66 
MacArthur & Co. 
... 
73-13 
Messrs. Finlay, Flem¬ 
ing & Co. 
16-9 
254 
83-45 
Professor Dunstan 
29-3 
24-6 
84-41 
Puran Singh (Forest 
Chemist). 
... 
... 
Analysed in February 
1911 before packing 
and sending it to Eng¬ 
land for valuation. 
8109 
Ditto 
1 Analysed again in June 
1911. 
238 
