520 



S. O. MAST 



TABLE 14 



Blowfly {larvae). Relation between wave-length and stimulation 



For description of table see legend table 2, p. 492. 



located between wave-lengths 513 and 524 nn, very near 503 mm, 

 apparently somewhat nearer the red than these regions are in 

 Chlamydomonas. The total effective region also appears to 

 extend somewhat farther toward the red in the former than in 

 the latter. In the whole 12 series of tests made the region of 

 maximum effect was found to be between wave-lengths 510 and 

 540mm in all but one. In seven of these the location of this re- 

 gion was very near 530 mm> in three near 520 mm, and in two it 

 was questionable. 



