56 PLANT PHYSIOLOGY 



192, I. 42, for oily read succulent 



193, 11. 23-4, for because he ... darkness read because they enable us to 

 see how much greater respiration is in flowers as compared with foliage leaves. 



11. 38-40, for Finally, a few examples . . . respiration read With reference 

 to this table it may be noted that some flowers investigated by Saussure, 

 especially CucurUta, are characterized by showing the maximum intensity 

 of respiration at the time of opening, while in the majority of flowers respira- 

 tion (in relation to their fresh weight) continuously diminishes from the young 

 stage onwards (MAIGE, 1906). This fact leads us finally to consider two examples 

 which show an alteration of this kind in the intensity of respiration during 

 development ; the first of these is, at the same time, also of interest in relation 

 to the absolute amount of respiration. 



194, 11. 1-5, for If we express . . . daily in mg. read As a second illustration 

 of the variation in respiration, according to the developmental condition, we 

 may give in graphic form (Fig. 36) the results RISCHAVI (1876) has obtained 

 for germinating wheat. A similar curve might be constructed from the numbers 

 recorded for Arum. In both cases, respiration increases as time goes on until 

 it reaches a maximum, when it once more falls. 



11. 12-17, f or that it is the living . . . such a comparison read that in all 

 probability certain enzymes are the immediate cause of respiration. Hence, 

 it would be of especial interest to know whether any relationship exists between 

 the amount of respiration and the amount of enzyme present ; but since the 

 quantity of enzyme is probably regulated by the protoplasm, a knowledge 

 of the amount of protoplasm in turn is of importance, and yet there are no 

 data available either as to its volume or as to its weight. 



1. 49, for masked read simply abolished 



195, 1. u, delete by killing the cells 



I. 17, for 1851 read 1852 ; delete (by means of baryta water) 



II. 51, 52, for cuticle (bis) read epidermis 

 1. 54, for equally read also adequately 



196, 11. 1-3, for The matter . . . tension read There may be some doubt 

 perhaps in this respect with regard to aquatics, for in their case the oxygen 

 in the surroundings has a lower tension. HOPPE-SEYLER (quoted by OLTMANNS, 

 Algen, II, p. 139) found 6-73 ccm. of oxygen in a litre of water from the Boden- 

 see, at a depth of 2 metres, and at a temperature of 4 C., and at 725 mm. 

 pressure, that is to say, only about 1/30 of that present in air. Roots and 

 rhizomes living in mud are doubtless in the most unfavourable position for 

 obtaining oxygen, and they attempt to counteract this by forming special 

 organs, known as ' pneumatophores ', which grow upwards into the air, or at 

 least into water layers richer in oxygen, and these carry out the necessary 

 gaseous exchange. 



1. 8, after spaces read (exceptions are recorded by CZAPEK, Biochemie, I, 



P- 33i), 



I. 12, for is read was 



II. 19-20, for are related . . . combustion read are dependent on the 

 character of the respiratory materials. 



11- 33-5. for It would be ... respiration read It would, however, be 

 quite wrong to regard the frequent occurrences of unity as the value of the 



CO 



fraction -^-? in higher plants as a proof that only carbohydrates were used up 



^i 



m respiration. 



