Roberts: The Founders of the Art of Breeding 



239 



of the Dwarf Imperial, a grey-seeded 

 pea, with the pollen of a tall white- 

 seeded variety. One pod with four peas 

 was produced, all of which were green, 

 i. e., the dominance of green cotyledon 

 color over its absence (white). The 

 plants growing from the four peas 

 (Fi seeds, as we should call them) were 

 intermediate in size between the two 

 parents, and the pods, on ripening, 

 "instead of their containing peas like 

 those of either parent, or of an appear- 

 ance between the two, almost every one 

 of them had some peas of the full green 

 color of the Dwarf Imperial and others 

 of the whitish color of that with which 

 it had been impregnated, mixed indis- 

 criminately and in undefined numbers; 

 they were all completely either of one color 

 or the other, none of them having an inter- 

 mediate tint." (Italics inserted.) 



Here again were recorded the pheno- 

 mena of dominance and of segregation, 

 but owing to the fact that the numbers 

 of seeds of each color of each plant were 

 not counted and recorded separately, 

 the results were not available for scien- 

 tific purposes, nor would they have 

 aroused attention any more than those of 

 Goss, except for Mendel's later work 

 with the same kind of plants. 



BIBLIOGRAPHY 



1. Gartner, Carl Friedrich von — 



(a) Versuche und Beobachtungen liber die 

 Befruchtungsorgane der vollkommeneren 

 Gewachse, und liber die natiirliche und 

 kunstliche Befruchtung durch den eige- 

 nen Pollen." Naturwissenschaftliche 

 Abhandlungen, Tubingen 1:1. 



{b) Notice sur des experiences concernant 

 la fecondation de quelques vegetaux. 

 Annales des sciences naturelles, 10 : \\i- 

 148, 1827. (Translation of the pre- 

 ceding.) 



(c) Over de Voorteling van Baastard- 

 Planten. Eene Bijtrage tot de Kennis 

 van de Bevruchting der Gewassen. 

 Haarlem, 1838. 



{d) Beitrage sur Kenntniss der Befruchtung. 

 Stuttgart, 1849. 



{e) Versuche und Beobachtungen iiber die 



Bastarderzeugung ina Pflanzenreich. 

 Stuttgart, 1849. 

 (/) Methode der ktinstlichen Bastardbe- 

 fruchtung der Gewachse, und Namens- 

 verzeichniss der Pflanzen, mit welchen 

 Versuche eingestellt wurden. Stuttgart, 

 1849. 



2. Goss, John — 



On the variation in the colour of peas, 

 occasioned by cross-impregnation. Jour- 

 nal of the Horticultural Society of Lon- 

 don, 5:234, 1824. 



3. Herbert, William — 



(a) On the production of hybrid vegetables; 

 with the result of many experiments 

 made in the investigation of the subject. 

 Transactions, Horticultural Society of 

 London, 4 : 15-50, 1819. 



{h) On crosses and hybrid intermixtures in 

 vegetables; pp. 335-380 of "Amarylli- 

 daceae; preceded by an attempt to ar- 

 range the monocotyledonous orders, and 

 followed by a treatise on cross-bred 

 vegetables, and supplement." London, 

 1837. 



4. Knight, Thomas Andrew — 



(a) Observations on the means of producing 

 new and early fruits. Transactions 

 Horticultural Society, 1 : 30-40. London, 

 1806. 



ih) On the comparative influence of male and 

 female parents on their offspring. Trans- 

 actions, Royal Philosophical Society, 

 Part 1 : 392-399, 1809. 



(c) Observations on hybrids. Transactions 

 Horticultural Society of London, 4 : 367- 

 373, 1821. 



{d) An account of some mule plants. Trans- 

 actions Horticultural Society of London, 

 5 : 292-296, 1823. 



(e) Some remarks on the supposed influences 

 of the pollen in cross-breeding upon the 

 color of the seed-coats of plants, and the 

 qualities of their fruits. Transactions, 

 HorticulturalSociety of London, 5 : 277- 

 380, 1823. 



(/) A selection from the physiological and 

 horticultural papers published in the 

 transactions of the Royal and Horticul- 

 tural Societies, by the late Thomas 

 Andrew Knight, to which is added a 

 sketch of his life. London, 1841. 



5. Seton, Ale.xander — 



On the variation in the colours of peas 

 from cross-impregnation. Journal of the 

 Horticultural Society of London, 5:236, 

 1824. 



6. Wiegmann, a. F. — 



Ueber Bastarderzeugung im Pflanzen- 

 reiche. Braunschweig, 1828. 



{To be continued) 



