62 
The accompanying table gives an outline of this hybridization 
work in 1932. The most important result is, of course, the ac- 
quisition of 189 new hybrid nuts, which were planted immediately 
in our greenhouse, and in some cases, at the present writing, are 
commencing germination. It will be noticed from the accompany- 
ing table that less than !4 of the pistils were pollinated three 
times—in fact, some of them were pollinated only once. It would 
save much time and labor if we knew which pollination was most 
effective. This next season we hope to carry on experiments look- 
ing toward enlightenment on this point. 
Japanese-American Chestnut Hybridization Work in 1932 
(Only one tree, that of Mr. Renville S. Smith, Oyster Bay, L. I, was used 
as the Japanese (2) parent) 
Pollination Work: 
Branches bagged 2.0... .00.0..0 0000 cee June - a i: July 2, (103). 
July 
US DOUIHAMOR: jx delavetp ene eee ye eeene > 7, (06); 9, (63) ; 
12 oe 
Pel PP OUNATIONE eta ye s 5 4s voce eked kemale July 7, (9); - (43); 12, (121). 
OO POUIMACON £245 yh gu aie cata de suns July 
Harvesting and Planting: 
Ue OR Sais cena each ene eide September 17: 185. 
itts: SCOUECECG. «gece puciniie ned «eae bd tow d wir orcaoseiew ae October 19: 189, 
DUES DNC sews tacewe said Piidecdy bar bodseadeed October 24 to 27, 
Other chestnuts received and planted during fall of 1932. One 
species which we have always lacked in our plantings anc 
— 
hy- 
bridization work has been the common Iuropean chestnut, Cas- 
lanea sativa. One of the objects of my trip to Europe in the sum- 
mer was to see this tree and arrange if possible for a supply of 
nuts. Several trees in southern Irance near Lake Geneva were 
photographed. Specimens were seen also in northern Italy. Ar- 
rangements were made with Drs. Ulbrich and Hochreutiner, and 
M. Guillaumin, of the Berlin and Geneva Gardens and the Jardin 
des Plantes respectively, to ship us some of the nuts of this species 
when ripe in the fall. Thanks to the courtesy and cooperation of 
these gentlemen we received shipments during the fall, and have 
planted these nuts in the greenhouses, as follows: 
'The figures in parentheses refer to the number of bags. 
