June, 1921] DIGGING UP FACTS FOR NEW HAMPSHIRE FARMS 25 



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Results from equal areas of sprayed and unspraj'ed potatoes. The two 

 piles at the left were dug from a sprayed plot, the ones at the right from an 

 unspraj^ed plot. The use of control measures universally throughout the state 

 'in 1919 would have meant a difference of $1,500,000 in the state's potato crop. 



Ground cages in which apple maggots were studied at Experiment Station. 



