54 



JOSHUA ROSETT 



A study of table 1 shows that, on the whole, there is a dispro- 

 portion between the number of fragments of KMn04 planted 

 in each test tube and both the number of stems and the total 

 stem-length (the sum of the lengths of all the stems in the test 

 tube) produced; that while the single fragment in the first test 

 tube had produced 3 stems — had produced a total length of 

 growth of 19.9 cm. — a similar fragment in the last test tube had 

 produced only 1.3 stems of a total length of only 8.52 cm. On 

 the other hand the table shows that notwithstanding the total 

 diminution of the product as the crowding of the fragments 

 increases, taller specimens are, on the whole, to be found there 

 than where the crowding is least; and in contrast to this, the 

 shortest specimens as well are found where the crowding is 

 greatest. 



TABLE 2 



Stems were permitted to grow for twenty-five hours in 12 test tubes, each 35 cm. in 

 height and 2.5 cm. in diameter. The test tubes were filled to within 2.5 cm. from 

 the top. 



Number of fragments of KMNO4 

 test tube 



in 



Number of stems which arrived at 

 the top of the solution 



Al canalicular formation completely 

 (C) encircles the wall of the test 

 tube at its junction with the top 

 of the solution, or, (1), incom- 

 pletely 



36 



Table 2 shows that the chances for re-growing the stems from 

 the KMn04 deposited at the surface of the solution are greater 

 where the crowding of the fragments is greatest. Of the stems 

 grown in the test tube containing three fragments of KMn04, 

 none reached the top of the solution, consequently no canalicular 

 formation was produced, and therefore no KMn04 was deposited. 

 The canalicular formations in the test tubes contairfing a fewer 

 number of fragments, are, on the whole, incomplete, and there- 

 fore contain less KMn04 than the complete canalicular forma- 

 tions in the test tubes containing a larger number of fragments. 



