Part IV.] Puran Singh : Preparation of Tannin Extracts. 81 
containing 20 per cent, of moisture. For purposes of estimate, however, 
the ratio of bark to extract is taken at 2*6 : 1 instead of 2 : 1, thus 
allowing for the variation in the quality of the bark. 
The Working of the Factory .—The tannin factory should be worked 
day and night. 
The following rough estimate of the capital outlay on a model tannin 
factory capable of dealing with 60 tons of bark or tan woods in 24 hours 
is adopted from the original estimates of Messrs. Dumsney and Noyer, 
Chemical Engineers of France, as given in their Wood Products Distil¬ 
lates and Extracts. 
The total outlay is estimated at R2,86,500, as follows 
I. Battery of wooden vats. The battery of 16 wooden vats of 
4,400 gallons capacity ...... 
II. Two cutters with angular boss, capable of reducing BO metric 
tons of wood into chips in 12 hours .... 
III. Two elevators and one conveyer . 
IY. Steam engine 50-70 H. P. 
V. Boilers, 120 sq. ft. heating surface ..... 
VI. Two gas generating furnaces ...... 
VII. Triple Effect evaporating plant (capacity 770 gallons evapo¬ 
rated per hour) ........ 
VIII. Four decanting turbines with an output of 220 gallons (Re- 
batl, Buffand & Co.’s system) ..... 
IX. Factory buildings (including shed, stores) .... 
X. Site for the building with a water supply of 11,000 gallons 
per hour ......... 
XI. Waterworks ......... 
XII. Five refrigerators ........ 
XIII. Vats for liquors ......... 
XIV. Office and laboratory ....... 
XV. Noyer’s condensor-re-heater reservoir .... 
XVI. Shafting and pullies ....... 
XVII. Incidentals for casks, weighing machines and equipment 
XVIII. Running capital ........ 
R 
39,000 
4,700 
3,000 
7,200 
18,000 
3.600 
48,000 
9.600 
27,000 
7.200 
4,800 
4,800 
2,400 
1.200 
2,400 
1,200 
2,400 
1,00,000 
Grand Total 
2,86,500 
248 
