CONTRIBUTIONS FROM THE WISLEY LABORATORY. 165 
and was similarly demonstrated by trees of the other varieties in 
the experiment. From these figures it will be seen that the trees 
are not behaving in the same manner as did the parent trees, and 
from the first year of cropping it has been apparent that all the 
trees of Good History were not regularly carrying good cops, 
neither were the trees of Bad History all carrying poor crops. In fact, 
on the average of several trees, much the same quantity of fruit was 
borne by both groups, as is clearly shown by the average of 52 and 54 
from twenty-five trees of each parent. 
The other varieties on the two kinds of stocks behaved in very 
much the same manner, as is illustrated by the curves on the opposite 
page. These curves show the relative fruiting of each tree, the dotted 
lines representing the trees of Bad History, and the unbroken lines 
the trees of Good History. 
The extremes and average number of fruits from each group 
for the trees shown on the charts are : 
Fig. 40. — ' Egremont Russet ' on Crab stock. Good History trees, 
158-0, with average of 78 ; Bad History trees, 184-2, with 
average of 76. 
Fig. 41. — ' Egremont Russet ' on Dwarfing stock. Good History 
trees, 152-2, with average of 82 ; Bad History trees, 177-4, 
with average of 78. 
Fig. 42. — ' Duchess of Oldenburgh ' on Dwarfing stock. Good 
History trees, 156-10, with average of 74 ; Bad History 
trees, 141-7, with average of 74. 
* Cox's Pomona ' on the Dwarfing stock and ' Duchess of Oldenburgh ' 
on Crab behaved in the same manner, although rather less fruit was 
carried by these. Unfortunately, the majority of the trees of ' Ecklin- 
ville Seedling ' in both stocks have suffered so badly from the attacks 
of the Brown Rot fungus {Monilia fructigena) that reliable observa - 
tions on their cropping have been rendered impossible. 
Sufficient evidence is available from the other three varieties, 
however, to say with certainty that the trees of Good History have 
not yielded better crops of fruit than those of Bad History, and that 
the differences observed in the cropping habits of the parents have 
not been passed to their progeny. 
It is interesting to note at the same time that the Good History 
trees did not bear better quality fruit, or fruit in any way superior 
to that carried by trees of Bad History ; much good and indifferent 
fruit was borne by both, and varied with the season and in- 
dividual trees, but on the whole that from the Bad History trees was 
equally as good as that from the Good History trees. 
It may be safely assumed, therefore, that such differences between 
trees of a variety, as the habit of carrying good or poor crops, are not 
transmissible when trees exhibiting them are propagated from 
vegetatively. 
Apparently with the idea that such differences will be reproduced 
