SUPPLEMENT 



P. 1,1. 36, for Changes of position . . . transformation of energy (P. 2, 1. 6), 

 read Changes of position, or movements of the entire organism or of its parts, 

 are not readily observable in all forms, still in every case they may be shown 

 to exist by using appropriate means. We speak of these phenomena collectively 

 as Movement. 



2, 11. 13-15, for In the following . . . metabolism read In the following pages 

 we have to treat of changes in form or the physiology of development, changes 

 in space relationship or the physiology of movement, and metabolic changes 

 or chemical physiology, and we shall begin with the last of these, metabolism. 



11. 42-4, for If a physicist were . . . bent over read If a physicist were to 

 find that a wire, fixed at one end and bearing a metallic knob at the other, 

 bent over, as gravitation acting on the knob would bend it, he might reasonably 

 deduce that the wire did so 



3, 11. 9-16, for Qualitative analysis . . . very limited read The results of 

 qualitative analyses lead one to the conclusion that of the seventy or more ele- 

 ments that are present in the soil only a few are regular constituents of the plant 

 body, namely, the following thirteen : H, O, Cl, S, N, P, Si, C, K, Na, Ca, Mg, Fe. 

 The gain in scientific insight which such an analysis affords us is, however, 

 all the more limited since in this enumeration, be it right or wrong, the elements 

 present in small amount are entirely omitted. Were it asserted that all the 

 elements were to be found if a careful search were made for them, it would be 

 rash to contradict the assertion. 



11. 33-5, for We know . . . families read We may perhaps, in time, get to 

 know of the existence of one or more compounds peculiar to each species ; 

 meanwhile we are already acquainted with many which are characteristic of 

 certain genera or families. 



11. 49-54, for such as ... student of Biology read more especially that of 

 CZAPEK (Biochemie), and also those of EBERMAYER (Phys. Chem.), HAMMERSTEN 

 (Phys. Chem.}, and ABDERHALDEN (Phys. Chem.}. 



4,1. 12, after cholesterin read (phytosterin) 

 1. 13, delete but which have a more complex composition. 



I. 23, delete Amido-compounds . . . acid-amides, and for The amido-acids 

 read The amino-acids 



II. 25-6, for amido-succinic read amino-succinic ; for amido-caproic read 

 amino-isobutyl-acetic acid ; for amido-propionic read amino-propionic 



1. 27, for The acid-amides arise read Amides of amino-acids also frequently 

 occur, which arise 



I. 28, for amido-succinic-acid-amide read amino-succinamic acid 



II. 29, 36, 38, for etherial read essential 



I. 38, delete 6. and follow on 1. 37. 



II. 39-40, delete these bodies . . . determine ; for 1900 read 1906 



I. 41, for 7. read 6., and renumber succeeding paragraphs accordingly. 



II. 49-50, delete the ' aromatic sugar ' 



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