ioo PLANT PHYSIOLOGY 



11. 38-9, for throughout the year read for years 



I. 41, for that roots swell into tubers since read that even roots swell into 

 tubers if 



II. 46-53, for We have as yet . . . appropriate fusions, read When the scale- 

 leaves of Oxalis crassicaulis subsequently swell and become reserve store-houses 

 we have an instance of the transformation of an organ already apparently 

 fully formed, a phenomenon at least by no means frequent (comp. however, 

 WINKLER, 1902 a). The bulbs of other species of Oxalis, however, teach us that 

 a change of function and accompanying change of structure may appear very 

 late in their history. While, generally speaking, the formation of reserve scale- 

 leaves may take place directly from as yet undifferentiated leaf primordia, the 

 bases of normal foliage-leaves of many species of Oxalis swell out into scale- 

 leaves (HiLDEBRAND, 1888) and persist while their petioles and laminae die off. 

 Similar phenomena are recorded by GOEBEL (Organography , Vol. I, p. 9 and 

 Vol. II, p. 398) as occurring in certain Fumariaceae. How far these leaf-bases 

 have developed when they receive the stimulus which causes them to swell, has 

 yet to be settled. 



As in regeneration phenomena, so also in the examples now given of 

 inhibition and transference of functions, we have become acquainted with a 

 whole series of correlations. Further illustrations are afforded us by a study of 

 transplantation, to which we now turn. Transplantation the artificial graft- 

 ing of part of one plant on another has long been practised in Horticulture, 

 and has been interpreted scientifically in consequence of VOCHTING'S experi- 

 ments. The simplest instances of transplantation studied by VOCHTING (1892) 

 were those in which he removed a cubical portion of beetroot by suitable inci- 

 sions, and replaced it in the wound so formed in its original orientation. After 

 ligaturing it in position in an appropriate manner, a rapid healing of the wound 

 took place, 



333, 11. 15-16, delete [MiEHE . . . manner.] 



11. 33-4, for as when . . . resorted to. read; thus, in ' budding ' a single bud, 

 in ' grafting ' a small twig is transplanted. 

 1- 35) f or the graft is read it is 



334, 1. i, for grafting read budding; for cortex read rind with cambium 

 cells attached 



11. 5-8, for Of the numerous . . . result, read Of the many types of grafting 

 we need select only one, viz. cleft-grafting, where the end of the stock is split 

 longitudinally and the bevelled end of the scion is sunk into the cleft. In this 

 case, as in budding, scion and stock must be firmly bound together until a 

 fusion is effected. 



1. 17, for Peireskia read Pereskia 



I. 18, for graft badly on read form unsuitable stocks for 



335, 1. 5, for for certain buds of read and then the buds of the scion close to 



II. 6-8, for In the course ... do not read In forming these stola the 

 tendency of the scion is clearly to form organs of storage which cannot 



1. n, after stock insert as that 



1. 14 P. 337, 1. 27, for We have spent ... of organs, read To refer so 

 numerous and heterogeneous phenomena to the principle of correlation is only 

 a step towards explaining the causes of plant form, and that too only a slight 

 one. Although it is true we are able to demonstrate the existence of correla- 

 tions we cannot, as yet, elucidate them further the effect of one part on another 

 remains a complete mystery. We do not deny that one organ may inhibit the 

 growth of another by withdrawing nutrients or water from it, but it must be 

 emphasized that we cannot altogether rest content with such simple assump- 



