79 
The following will give some idea of the combinations used in 
crossing, where J = Japanese chestnut, A— American chestnut, 
and JA = Japanese-American hybrid. In each case the first 
parent is the female. 
Parent Trees Nuts Obtained 
J . oe A alr ie MR a hapten eee gd a eee nn ee a Mae 255 
BE MT eR er Peed fc aR naar ee arc 162 
JAX DX GA XD Se es a 0G a Oe er ae 72 
URN spl pascal ere ae nce ea ROR A ies Aan ee Rae LY 14 
cea SE (IAS SUAS) imei et cst Ae prereset 11 
From these and other crosses, 884 hybrid nuts were obtained 
in 1942, 

As in previous years, the cooperation of many 
individuals and institutions has been most gratifying and encour- 
aging. The White Memorial Foundation, Inc., Litchfield, Conn., 
through Mr. Wm. Mitchell Van Winkle, president, and Mr. Clif- 
ford Ongley, superintendent, has taken over the raising and cross- 
ing, under our direction, of our Chinese-American hybrids and 
some of our pure Chinese seedlings, these having been transplanted 
April 25 from Hamden, Conn. to a good site near the East Morris— 
Litchfield road. Other hybrids, mostly of Chinese, Japanese, and 
Chinese chinquapin (C. Seguinii), were planted out on the estate 
of Mr. Archer M. Huntington at Redding Ridge, Conn., by the 
Connecticut Agricultural Experiment Station, through Dr. D. F. 
Jones, Geneticist at the Station ; and on April 30 many combinations 
of the Chinese, Chinese chinquapin, S8, and the Japanese were 
transplanted by Mr. Holland R. Sperry to the grounds of the 
Avon Old Farms School, Avon, Conn. Dr. Jones also gave us 
the assistance of some of his men during the pollinating season 
and for a few days in addition; we are pleased to acknowledge 
this assistance here. 
Pests—We have been troubled more and more each year by 
the short-tailed pine mouse, which works underground, sometimes 
more than 6 inches deep, making use of mole runs where possible, 
and eating the roots of the chestnuts. We have lost many valuable 
hybrid seedlings on account of his depredations. Mr. F. 
Schuler, of the U. S. Department of the Interior, Fish and Wild 
