385 



45 12i 50 \2h 55 J2i dahkI o 12i 5 121 10 12i 15 12| 20 13 25 

 16 30 13 35 12 40 lOi 45 9 50 10 55 lO^ 1 hour lOi 1.05 lOi 1 10 



.V». 2. Kfjiosed beforekaiid for 4 /ir)»r,v ,// 2I°,9 C. to 64 il//v. 



51 20 54 20 5T 20 D^KK ! O 19 3 19 6 19 9 20 12 19 15 18 18 

 18 21 22 24 21 27 18 30 J 7 33 17 38 IH 41 17 44 17 47 18 501953 

 18 56 18 1 hour 18 1.03 18 1.06. 



JSfr 3. E c posed heforehand for 4 hours at 22°,2 C. to 64 MK. -. 



51 2! 54 21 57 21 Dark! O 22 6 2 1 9 22 12 24 15 28 18 29 



21 27 24 26 27 24 30 24 33 25 36 24 39 22 42 23 45 24 48 25 51 

 27 54 27 57 28 1 hour 26 1.03 25 1.06 25 1.09 25 1.12. 



N». 4. Exposed beforehand for 8 hours at 21°,9 C. to 64 MK.: 

 50 9 55 8 Dark'. 9 5 9 10 11 15 1 1 20 12 25 II 30 101 35 ]0 

 40 9^ 45 10 50 10 55 9^ 1 hour 9^ 105. 



N'. 5. Rrj)Osed heforehand for 6 hours at 22°,0 C. to 64 .1/A". : 



40 9 45 9 50 9 55 9 Dakk ! 8i 5 9 10 11 15 12i 20 14 25 12 



30 11 35 10 40 10 45 10 50 9^ 55 9 1 hour 9 1.05 9 1 . 10 9 1 . 15 9 1 .20. 



NV 6. Exposed heforehand for 4 hours at 21°, 1 C. to 64 MK.: 

 45 26 48 24 51 25 54 25 57 25 Dark! 24 3 24 6 25 9 25 12 

 25 15 28 19 30 21 33 24 36 27 36 30 36 33 29 36 24 39 24 42 26 

 45 24 48 25 51 25 54 27 57 27 1 hour 26 1.03 27 1.10. 



The occurring dark-growtli-i-espoiises in the above cases yield the 

 following averages for the cardinal points: 



In some cases there is apparently a siiglit secondary maximnm 

 after 50—60 Min. (Nos. 2, 3, 4 and 6). Little may be concluded 

 from these experiments with resjiect to the final rate of growth. It 

 does not seem to deviate mnch from the rate in light. 



The above shows a distinct response of growth, again contrary 

 to the light-growth-response. Again it is less intense than the lighl- 

 growth-res|)onse; the former gives a slighter change of growth; the 

 undnlafory movement is less vehement (undulation of shorter dnration 

 with slighter amplitude). 



