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Show CHAP. nr. MIMUL US LUTE US. GG . me pot, though not f·ertiliscd ones on the opr1 osite bseidfoer eo f wthhee ns at hey were subjected t degree as ' nearly to so grea . a tition. 7 Third Generation.- scvere compe l t oF t ~e . . d . l . to very .. <elf-fertilised pun s " d sclf-fcrtihsc scet. Crossed and . the crossed plants, an tion were .·own Crossed seeds fr~~ d plants of the last gen~ra Th~ two tallest from the self-fert: Isedes of a small pot, No. had flowered, and thickly on oppos~ Sl ere measured after they nd the two sclfpbntt s on oachdSI enwes were 12 and 7 ~ Inchtehs,tai·s in the ratio of crosse 0 the wo d 5, inches m· h m·g · h t '· d a ' · 1 nt were agam fertilised ones 8 a~ fl~wers on the crosse ¥a hich contained 100 to 69. Tw~ y d twenty capsules; ten o :;c clf-fcrtili,cd cro .. scd and pr~h~c;f seeds. Thirty flowers ;:duccd twenty-six 1· 33 grain Welo . If-fertilised and P . . I'"'Oor) cou-agmn se being very J plants were f the best of which (many h t ·s in the ratio of ca.p sudl es; ton ° . eight of seeds; t a I ' 1 ·87 grain w tam0 e o6n5 yb y we1.g ht· the se lf- fertilis· ed plantr; J 0 to . . t of the crossed over . . d ds were sown on The supcrwn y. Self-fertlhse see l, on the d . anous ways. d osscd f::ccc s was prove m v d two days afterwar s cr u·~l until they one side of a pot, ant lots of seedlings were eq l .l the two · d The wo f lly growr opposite Sl e. ·nch high; but when . u '· nd 8~ inches, were above half an ' 'ned a height of 12, a and 51 tallest crossed. plantstattl~~fertilised plants were only 8 . th two talles se w· luhl st 1 · e· h wn four d a ys after the me es ''g. . crossed seeds were so had at first, aJ< In a tthrrd pot, dlings from the latter l- . the two .l. d and the see . but W11Cn f.:Clf-fer 1 rse ' t d an advantage' . ·c equal might have been expec e ' . h . ht they wer ' 5 d 6 inches m eig ' 11 10 and lots were betweehn thanee tallest crossed plants were 12, 81, and · t 1 t c r t·1· d wore ' 2 ' an<l ultuna e. y he three tallest self-fer 'ISO much difference 8 mches, w~Ilst t So that there was not . . advantage 7 4 inches m height. sscd plants having an averag~ down, and between them, the cro . h The plants were cu 1 ·er pot. th. d of an rnc . l . to a arg of only the. It isturbcd were tmnsplantcc m ring and now without bemg d t l fair on the followmg sp f' the twn Thus the two lots s~a:w:~ their inherent supcn~~~t;;li~~d plants the eros eel plants s h'l t the two tallest self cr 7" The to,llcst were 13 inc~:~~;h:ssin height; or as 100 a:~ou~iy: the ,yere1 o tn ly 11 and 2 d t fertilise thmnselves Rpontl whilst the two o s were allowdeu ce0d a large numb cr of C,a l1SU c. ' The sect]" crossed plants pro l , few and pom· ones. self-fertilised produccc vciy CHAP. III. CHOS ED AND SELF-FEHTILISED PLANTS. 67 from eight of the capsules on the crossed plants weighed · 65 grain, whilst those from eight of the capsules on the self-fer- . tilised plants weighed only · 22 grain; or as 100 to 34. Tho crossed plants in the above three pots, as in almost all the previou · P-XlJeriments, flowered before the self-fertilised. This occurred even in the third pot in which the crossed seeds were sown four days after the self-fertilised seeds. Lastly, seeds of both lots were sown on opposite sides of a large pot in which a Fuchsia had long bee:g growing, so that the earth was full of roots. Both lots grew miserably; but the crossed seedlings had an advantage at all times, and ultimately attained to a height of 3~ inches, whilst the self-fertilised seedlings never exceeded 1 inch. The several foregoing oxperimcn ts prove in a decisive manner tho superiority in constitutional vigour of tho crossed over tho self-fertilised plants. In tho three generations now described and taken together, the average height of the ten tallest crossed plants was 8 ·19 inches, and that of the ton tallest self-fertilised plants 5 · 29 inches (the plants having been grown in small pots), or as 100 to 65. In the next or fourth self-fertilised generation, several plants of a new and tall variety appeared, which increased in the later self-fertilised generations, owing to its great self-fertility, to the complete exclusion of tho original kinds. The same variety also appeared amongst the crossed plants, but as it was not at first regarded with any particular attention, I know not how far it was used for raising the intercrossed plants; and in the later crossed generations it was rarely present. Owing to the appearance of this tall variety, the comparison of the crossed and self-fertilised plants of tho fifth and succeeding generations was rendered unfair, as all the self-fertilised and only a few or none of the crossed plants consisted of it. N evertholoss, the gl'ievsiunlgts. of the later experiments are in some respects well worth Or·ossed and 8e1j-jertilised Plant.c; of the Fourth Generation.-Secds of the two kinds, produced in tho usual way from the two sots of plants of the third generation, were sown on opposite sides of two pots (I. and II.); but tho seedlings were not thinned enough and did not grow well. :Many of the self-fertilised plants, especiaJly in one of the pots, consisted of the new and tall variety above referred to, which bore large and almost white flowers marked with crimson blotches. I will call it the 1Vhite variety. I believe that it first appeared amongst both tho F 2 |