d by estimate. Tables 2 to 5 contain the mean of these estimates
and a considerable variation in catkin hardiness in the different
populations is evident. Red Lambert, which had the hardiest catkins of
any variety of _C. Avellana_ tried at Geneva, produced a higher
proportion of catkin-hardy seedlings than any other variety. Cosford was
fairly good in this respect and in orchard 16 Bollwiller, Italian Red,
and Barcelona when crossed with Rush produced selections with moderately
hardy catkins.

Winter injury of catkins was nearly always very high in crosses between
varieties of _Corylus Avellana_.

Of the 1,970 seedlings included in Table 1, 340 or 17%, were retained
for further observation and of these, 52, or 2.6%, were considered good
enough to propagate for a more extensive test. Of these 52 a few thus
far have been outstanding when compared with the others. Possibly the
best and most productive selection is No. 1265, Rush x Purple Aveline,
that is the heaviest yielding of all and the nuts are also among the
best, being of medium size, plump, and free from fiber. This seedling is
far superior to any others from the same cross. Nos. 1408 and 1467, both
selected from a Rush x Cosford population, are close seconds to No.
1265. In the Rush x Cosford population are several others nearly as
good, the general level of merit in this combination being fairly high.
Farther down the list, but still among the best, are No. 110 Rush x
Kentish Cob, and No. 157, Rush x Barcelona. Filbert breeders working
under similar conditions would probably find it worthwhile to make these
crosses and also to produce more seedlings from Rush x Red Lambert than
were raised at Geneva.

No crosses have been made at Geneva in recent years, but all of the nuts
from the selections, sometimes several hundred pounds a year, have been
planted by the Soil Conservation Service and the resulting seedlings
planted in various parts of the country. Undoubtedly, if these could be
examined when in fruit, some worthwhile selections could be made. Those
in New York State will probably be worked over during the next few
years.

TABLE 1. Results from filbert crosses.

Number of Num- Percent- Number Percent-
Seedlings ber Re- age Re- Prop- age Prop-
Cross Fruited tained tained agated agated

Rush x Kentish Cob (Du Chilly 430 63 14 11 2