COMMERCE IN MAIZE GRAIN 597 



Maize may contain from 12-5 to 13-5 per cent of moisture chap. 



on arrival in London, and yet be perfectly sound and sweet. 

 But as it may gain from 1 "5 to 2 per cent moisture in transit, 

 it should not contain more than 12 per cent moisture when it 

 leaves South African ports. A sample containing 127 per 

 cent on shipment was slightly damaged on arrival, but this ap- 



XII. 



Fig. 205. — The Hess grain-drier for conditioning grain. 



pears to have been due to contact with wetter bags, for it 

 gained 1 7 per cent moisture in transit, bringing the moisture- 

 content up to 14-2 per cent. 



Mai/.e containing 16 per cent moisture does not absorb 

 much (-02 to -36 per cent) in transit; but dry maize contain- 

 ing only 127 per cent moisture may absorb more. We 



