Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 91American Philosophical Society, 1947 |
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Сторінка 104
... varieties changes from time to time . races . the result is that the development of rust - resist- ant varieties is becoming more complex because of the recent establishment of this race and at least one other that also attacks hitherto ...
... varieties changes from time to time . races . the result is that the development of rust - resist- ant varieties is becoming more complex because of the recent establishment of this race and at least one other that also attacks hitherto ...
Сторінка 106
... varieties of potatoes . As is the case with so many pathogens , however , there are parasitic races of the blight fungus , and the appearance of new ones has all too often nullified the efforts of breeders . Be- About the middle of the ...
... varieties of potatoes . As is the case with so many pathogens , however , there are parasitic races of the blight fungus , and the appearance of new ones has all too often nullified the efforts of breeders . Be- About the middle of the ...
Сторінка 107
... varieties ; but no variety of flax is resistant to all of the known parasitic races of this fungus . As far as now known , however , there is no single country in which all of the races occur . It is therefore of the greatest possible ...
... varieties ; but no variety of flax is resistant to all of the known parasitic races of this fungus . As far as now known , however , there is no single country in which all of the races occur . It is therefore of the greatest possible ...
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Atomic Physics and International Cooperation NIELS H D BOHR | 137 |
An Electronic Reading Aid for the Blind V K ZWORYKIN and L E FLORY | 139 |
45 | 230 |
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Academy Alexandre Hardy American Philosophical Society Arch auteurs autres avait avant avoir Bellerose bien C'est century comédiens du roi comédies Congress d'une deux diseases dramatique East Melchior Island été evidence faict fait Fonds XV Franklin Geminid Hindu human Hume Ibid India interracial Island Jews jouer jour l'Hôtel de Bourgogne labor Langley laws of nature League lesd letter Lincolnshire livres livres tournois Maclure Maclure's ment meteor miracles Montdory Muslim Negro observations œuvres organization Pakistan Paris party pastorales peace Peirce Peirce's Perseid petroglyphs pièces Pierre le Messier poèmes poète à gages political porphyries premier present problems Proceedings promect province qu'il race racial radiant représentations Robert Guérin rust scientific scientists sera somme temps théâtre tion tonalite tout tragédie tragi-comédies trails troupe United Valleran le Conte Voir Appendice William Maclure Yorkshire