i 2 8 PLANT PHYSIOLOGY 



respiration in these cases was thus not transformed into heat, or else the heat 

 produced was at once used up in metabolism. 



1. 33, after suggested, read In Palms the heat serves, perhaps, to bring about 

 bursting of the spathe (KRAUS, 1896). 



1. 51, after luminous read and to be given off by many animals 



I. 55 P. 402, 1. 3, for bears the same . . . permanently, read is manifested 

 only when oxygen is present, and that it is due to an oxidation process. It 

 cannot, however, be directly referred to respiration (MOLISCH, 1904), for, under 

 certain circumstances, especially at high temperatures, the luminosity ceases, 

 while respiration increases. Frequently the capacity for giving off light in a 

 certain species is lost as a result of high temperature or some other influence, 

 although growth and respiration continue unimpaired. 



402, last line, after 1888 read ; comp. FITTING, 1906). 



403, 11. 13-14, delete The rest . . . movements. 



II. 17-18, for We have now to read Later on we shall 



11. 34-46, for we need only . . . mechanical energy read we have only 

 shown that respiration is an indispensable condition of protoplasmic movement, 

 not that it furnishes the energy necessary for it to take place (PFEFFER, 1892). 

 It is, however, very probable that respiration often has a direct energizing 

 significance, or, in other words, that the chemical energy released is transformed 

 directly into mechanical energy. 



404, 11. 8-12, delete i. The transformation . . . cells, &c. 



I. 13, for 2. read i. 



II. 25-7, for 3. Quite independently ... in plants, read Independently 

 of chemical energy, there are all the phenomena associated with ' surface 

 energy '. To these belong, amongst others, the phenomena of imbibition and 

 surface tension ; to whose, frequently not inconsiderable, activities as a means 

 inducing movements in plants, our attention will be directed presently. 



11. 28, 29, for 4, 5. read 3, 4. 



I. 30, for frequently read obviously 



II. 44-5, delete In the following ... by the plant. 



405, Lecture XXXII is XXXI in 2nd German Edition. 

 405. title of lecture, HYGROSCOPIC MOVEMENTS 



405, 1. 32, after situations, read Cell contents which possess a greater spe- 

 cific gravity than the protoplasm, such as, e.g., starch-grains and crystals, 

 collect, in obedience to gravity, at the lower ends of the cells (comp. Lecture 

 XXXIII). 



406, 1. 3, for orthotropic read rectilinear 



11. 39-41, for Hygroscopic . . . cell-wall ; read Hygroscopic movements 

 are due mainly to imbibition, and especially to changes in the water-content 

 of the cell-wall ; 



407, 11. 23-6, for with the best lenses . . . capable of swelling, read with 

 the best lenses. It does not follow, however, that such pores do not exist. 

 Again, the transparency, which is often put forward as an argument against 

 the existence of such pores, might be due to the fact that these spaces were 

 of ultra-microscopic dimensions (comp. BUTSCHLI, 1900, p. 318). There is, 

 however, another essential difference between finely porous bodies and bodies 

 capable of swelling, apart from the size of the" pores. 



11- 33-4. ft* in deposits on read in a pile of 



