212 



ARROWROOT 



left until the following morning. Tho water being allowed to run off, tlio surface 

 of the deposit is carefully scraped with German-silver palette-knives, to remove 

 any impure or coloured purts, and the lower portions only are dried and prepared 

 for the market Tho greatest care is token in drying ; and when dry, the fecula is 

 packed in tin-cases for exportation. 

 Fig. 74, plan of arrowroot grinding mill, and two sets of copper cylinder 



washing-machines, with the connecting machinery for driving thorn, the washing- 

 agitator being driven from the connecting shaft with leathern belts. Fig, 75, end- 

 elevation of copper washing-cylinder, with press framing, &c. The washing-cylinders 

 are 6J feet long and 3 in diameter. Tho mill rollers are 3 feet long and 1 foot in 

 diameter. Fig. 76, end-elevation of arrowroot mill, with wheels and pinions, dis-* 

 engaging lever, &c. 



