145 



the case. Prof. Bailey, who has made more than a thousand 

 careful hand pollinations and has obtained more than a 

 thousand types of pumpkins and squashes, has never seen 

 any immediate influence, except such as was due to imperfect 

 development, caused by insuflBcient or impotent pollen. 



Several years ago, in conjunction with Mr F. C Stewart, 

 some experiments were made in crossing cucurbits. Many 

 careful hand pollinations were made, but in not a single case 

 was any immediate effect observed. When this seed was 

 planted the following year hundreds of new forms made 

 their appearance. We are justified in concluding that there 

 is no immediate effect. 



Charles Darwin : Animals and plants under domestication. Vol I, p. 430. 



P.Dudley: Philosophical Transactions Abridgement, Vol. VI, Pt. II., p. 

 304-20.5. 



Kellerman and Swingle, Second Annual Rep. Kansas Exp. Sta., 1889, p. 346. 



Lewis Stiirtevant: Second Annual Rep. New York Agrl. Exp. Sta, p. 37-56. 



A. A. Crozier: Proceedings Soc Prom Agrl. (^cience 1P87, p. 1. 



W. J. Heal : Report State Board of Agriculture, Michigan, 1879, p. 198. 



Beal; Report State Board of Agriculture, Michigan, 18i8, p. 450. 



Kellerman and Swingle: Senond Ann^ iAl rt.t»pnrt. Jfag^Afri.! Exp. Station, 

 1889, p. 288. See also First Annual Report, p. 316. ' _______ 



Crozier and Rolfs: Agricultural Science, Vol. IV, p. 23. 



F. S. White: Iowa State Register, December 11, 1891. 



A, A. Crozier: Department of Agriculture Report, 1887, p. 313. 



Focke: Pilanzenmischlinge. p 475. 



P. H. Pammel: Ou the Crossing of Cucurbits, bulletin No. 19, Iowa Agricul- 

 tural Experiment Station, pp- 595-600, November, 1892. 



The Crossing of Cucurbits, proceedings of the sixth annual convention of 

 the Association of Agricultural Colleges and Experiment Stations, New Orleans 

 meeting, November 15-19, 1893, pp. 94^97. 



On the Crossing of Cucurbits, transactions Iowa Horticultural :^ociety, 1892, 

 volume xxvii, pp, 327-332. 



Brandza, Rev. Gen de Bot. 1890, pp. 301-305. Hot. fentralblatt, XL VI, p. 124 

 and p. 40. Hildebrand, Bot. Tentralblatt Vol. XL, p. 46. 



Macfarland: Botanical Gazette Vol. PVI, p. 255. A Comparison of the 

 Minute Structure of Plant Hybrids with that of our Parents and its bearings 

 on Biological Problems. Transactions of the Roy. Soc, Edinburgh XXXVII, pp. 

 203-208. Bot. Centralblatt LIII, p. 379. 



L. P. Pammel: Cross Breeding of Plants and Hereditary, Rural Life, Oct. 

 19, 1893. p. 12. 



Vilmarrin : Pedigree or Grade Races in Horticulture, Gardner's Chronicle 

 Vol. XIV, 3d series p. 301, p. 333. See p. 332. 



