1900.] PUBLIC DOCUMENT— No. 33. 



121 



ought to be bought and sold by weight and not by measure, 

 for both moisture and the general character of foreign mat- 

 ters are apt to seriously affect the weight of a given volume. 



Cotton-hull Ashes. — This waste product is receiving in- 

 creased attention from the farmers, and is an article of great 

 merit. The samples received this year analyze from 21 to 

 29 per cent, of potash, and are especially adapted to tobacco 

 growing on account of the large proportion of carbonate of 

 potash present, this form of potash being the most valuable 

 one known for that purpose. 



Sludge. — At the present time the larger cities are col- 

 lecting all waste debris in reservoirs, and subjecting it to 

 chemical treatment for recovery of fertilizing ingredients. 

 This source of plant food is often within easy reach of the 

 farmer, and may be turned to good advantage, as is seen 



