Productiveness and Degeneracy oe the Irish Potato 5 
Future Development If ork .— 1 he way is pointed to explanations 
of the indicated superiority of seed potatoes grown under mulch and 
of those dug as in England before they are ripe. The promise of the 
future is that conditions favor the production in the Rocky Mountain 
region of the new varieties of the future, because on the arid irri¬ 
gated plains the plants may be made sexual at will, be crossed, and 
then be developed under ideal irrigation conditions in our mountains. 
Improvement in varieties, which normally have a greater sexual de- 
PLATE II. AN IDEAL HILL OF PEARLS. 
Without Compound Eyes, Deep Eyes or Knots. 
velopment than prolific Pearls, will doubtless be found in the selection 
of those plants and tubers which are the most completely asexual in 
habit. 
AN OUTLINE OF THE OBSERVATIONS ON WHICH THE 
FOREGOING IS BASED. 
The Pearl Potato and the Pearl Seed Supply.—The Pearl is 
medium in time of maturity, and is better adapted to most regions 
of Colorado than any other sort. It is a great surface feeder and is 
adapted to soils made shallow by underlying moisture or gravel. It is 
a good keeper, and its vines are little subject to attacks by Fusanum, 
