^6 On the Manufacture of 



When the boiling procefs has extracted all the colouring matter afcertainable 

 by the colour exhibited, the extract is immediately poured into an adjoining 

 fmall jar fixed in the ground for its reception, and is thence laded in fmall 

 pots into larger jars difpofed on adjoining higher ground, being firfl filtered 

 through a cloth ; the jar when three-fourths full is agitated with a fplit bamboo 

 extended into a circle, of a diameter from thirteen to twenty inches, the hoop 

 twilled with a fort of coarfe flraw, with which the manufacturer proceeds to 

 beat or agitate the extract, until a granulation of the fecula takes place, the 

 operation continuing nearly for the fpace of three-fourths of an hour; a pre- 

 cipitant compofed of red earth and water, in the quantity of four quart bottles, 

 is poured into the jar, which after mixture is allowed to fland the whole night, 

 and in the morning the fuperincumbent fluid is drawn off through three or 

 four apertures practifed in the fide of the jar in a vertical direction, the lower! 

 reaching to within five inches of the bottom, fufficient to retain the fecula 

 which is carried to the houfes and dried in bags. 



This is the whole of the procefs recurred to in this part, which, I think, 

 if adopted in Bengal, might in no fmall degree fuperfede the neceffity of 

 railing great and exp^nfive buildings, in a word, fave the expenditure of fb 

 much money in dead flock, before they can make any Indigo in the European 

 method, to which I have, to add, that Indigo thus obtained poneiTes a very 

 fine quality. 



As I think thefe obfervations may be ufefulto the manufacturers vsxBengaU. 

 I could wifh to fee them printed in the Tranfaclions of the Afiatic Society. 



Ambore, 

 zd April t 1 79 1, 



