Part IV.] Puban Singh: Preparation of Tannin Extracts. 38 
If, however, the raw material used is poor in tannin it will be very 
difficult to make such a concern remunerative. 
The estimates given above are only provisional and the actual figures 
may vary according to the fluctuation of the market of tannin extracts 
and according to the care, expert knowledge and strict economy that may 
be brought to bear upon the working of such a concern. 
250 
