350 BOTANICAL GAZETTE [APRIL 
original seed tubers of series IV and V were recovered, the soil care- 
fully removed, and the potatoes weighed. ‘The results are given in 
~ table III. 
Series VI was planted with tubers produced from series I. 
These potatoes were kept in a closet in the greenhouse away from 
sunlight, but otherwise subjected to practically the same conditions 
as prevailed in the greenhouse. The rest period of this seed was 
230 days. The loss of weight of the potatoes during the rest 
period was not determined, but the loss was considerable as the 
TABLE III 
+e : Weight after 
. 0 1 ht : L f weight 
Series oa senor fee = “in gm. 
i a 82 82 0.0 
Ts sages 89 88.7 6.4 
Pe 53-6 53 0.6 
Nisa eo cday 56.9 Not recovered 
tubers were badly shriveled. The appearance of the seedlings 
above surface in the form of several stalks occurred on the seventh 
day after planting. The actual growing period was 64 days, and 
the period from planting to harvest 71 days. While series VI 
went through the growth cycle in less time than any other series, 
the actual production, both as to size of the plants and weight of 
tubers produced, was much less than that of any other crop of the 
entire experiment. 
Series VII and VIII were planted with tubers from the crops pro- 
duced from series II and III respectively. ‘The rest period for the 
seed of the former was 78 days and for the latter 82 days. The 
plants appeared in 12 days, and the growing period above ground 
averaged 75 and 74 days respectively, while the time from the day 
of planting to the day of harvest averaged 87 and 85.5 days 
respectively. Several stalks per plant were produced in all cases. 
Series VII and VIII came the nearest of any in the entire experi- 
ment to simulating series I, which may be considered the normal 
series, because it was grown from tubers that had the normal rest 
period, coming from winter storage. 
