STORAGE OF FOOD MATERIALS 39 
Determine also which seeds can produce the largest and 
strongest plantlets from the enclosed nourishment. 
Is there variation between those grown in different 
places? Ifso, how do you account for it? Do you think the 
sawdust and blotting-paper furnish any nourishment to the 
plants growing on them? 
Do the plants appear equally vigorous in all regions ? 
