SUPPLEMENT 129 



408, 11. 3-4, for the former being . . . the latter read the former being in- 

 versely proportional to a higher power of the separating distance than the 

 latter. 



409, 11. 1-2, for swelling . . . protoplasm read imbibitional swelling, and so 

 also both in cell-walls and in protoplasm. 



410, 11. 30-1, for again. Movements . . . that the bending read again, even 

 in the dead plant. Similar bendings take place, however, in living branches 

 of native trees. GANONG (1904) has shown that these curvings are obviously 

 due to variation in water-content, but it has yet to be shown whether the 

 cell-wall can really exhibit such variations in water-content while the proto- 

 plasm remains alive. In Anastatica it may be readily shown that the bending 



I. 42, after manner read (compare WEBERBAUER, 1901 ; STEINBRINCK, 

 1906). 



II. 47-8, for layering . . . striation read different orientation of the axes 

 of the contraction-ellipsoids, which manifests itself externally in the layering 

 of the cells in the course of the lamination or direction of the striation 



1. 50, for i. Differential contraction due to arrangement of cells read 

 Differential layering of antagonistic cells. 



411, 1. 14, for 2. Differential contraction, &c. read Differential lamination of 

 the cell-wall. 



1. 39, for 3. Differential contraction, &c. read Differential striation of the 

 cell-wall. 



412, 11. 53-4, for Let us assume . . . pulled out. read This effect may be 

 made clear by using a piece of ordinary writing-paper, which exhibits different 

 powers of contraction longitudinally and transversely. The lengthways and 

 breadthways of the paper are indicated by the ruled lines. If, now, two right- 

 angled strips of equal size be cut out parallel and at right angles to the rulings, 

 and if these be gummed together when wet, on drying the whole simply curves 

 inwards ; but if one of the rectangular pieces be gummed to the other so that 

 the rulings cut each other at acute angles, on drying the whole assumes a spiral 

 form (STEINBRINCK, 1906). 



414, 11. 49-50, for hygroscopic movements read movements due to shrinkage. 



415, 11. 32-3 and 54, and P. 416, 11. 46 and 52, for imbibition water read 

 water-content 



417, 11. 13-17, for Into the discussion . . . appear, read It is impossible to 

 discuss all these cases, and hence we limit ourselves to one only to which we 

 have previously referred. We found that certain Bromeliaceae were able, by 

 means of peculiar hairs on their leaves, to absorb water. These hairs, as seen 

 on surface view, appear as multicellular, shield-like protuberances of the leaf 

 epidermis. In section one notices two protoplasmic pedicel cells from which 

 spring the cells composing the plate (MEZ, 1904), and their lumina are more 

 or less filled with water. Should they lose this water to such an extent that it is 

 abstracted from the pedicel cells and the underlying water tissue, their thin 

 walls approximate in consequence of the cohesion of their water-content so 

 as to completely obliterate the cell lumina. When again wetted the walls 

 swell, the lumina reappear, and in so doing suck water in like pumps. Finally, 

 it must be noted that the cohesion of the water-content may also possibly 

 play a part in phenomena of swelling, so that the contrast between those two 

 sets of processes may not be so marked as would at first sight appear. 



1. 24, after anther-wall, read The phenomena discussed in this lecture 



JOST I 



