« 



1912] Goodspecd: Nicotiana Hybrids 97 



so cut that their diameter was a little greater than that of an 

 ordinary drinking-glass. These circular pieces of blotting-paper 

 were placed upon glasses nearly filled with tap water and a 

 connection was so made with strips of blotting-paper reaching 

 down into the water that the seed-holders were kept continually 

 moist without allowing an excess of water to collect about the 

 seeds themselves. A watch crystal covered each group of 100 

 seeds and their seed-holder and served to keep the drops of 

 moisture which condensed on the top of the germinating box 

 from falling onto the seeds and also aided in maintaining a 

 constant temperature about the seed (see Garman, 1910, p. 

 44). The temperature was very fairly constant within the box, 

 at 21° C, and never varied over three degrees throughout the 

 first twenty-six days of the experiment. The germinating case 

 was sterilized as thoroughly as possible and the seeds, arranged 

 as above described, placed within it on February 28. The fol- 

 lowing table gives the extent of germination between March 

 3 and March 31 for the different weights of seed. The numbers 

 given in the first vertical column refer to those used in the 

 table on page 95 to designate the 22 different weights of seed. 



March 3 5 7 9 10 11 12 13 14 16 17 18 20 21 23 27 29 31 % 



'1 & 2 9 8 7 1 .... 1 .... 1 1 .... 2 16 ^ 



3 6 9 5 8 6 .. .. 4 .. 1 .. 3 .. 42 o 



5!J 4 16 27 12 2 2 4 2 .. .. 4 .. 1 .. 3 73 





5 * 40 8 6 1 2 1 5 4 67 ^ 



6 20 29 .. 8 2 5 4 .... 6 2 1 2 3 82 ^ 



g [ 7 * 44 .. 3 .. 5 1 .. .. 3 4 .. 3 6 .. 2 .. .. 71 ] vo 



« 8 12 18 10 .... 4 1 3 .. 4 .. 1 1 5 59 ^ 



5'J 9 * 45 6 2 1 .. 3 5 .. 4 .. 1 2 6 .. 1 .... 76 I « 



B I 10 * 41 4 4 1 .... 6 2 .... 1 59 | ^ 



I 1] * 44 3 4 3 3 2 .. 2 5 66 | 



^ [ 12 * 39 .. 4 2 1 2 2 1 1 2 .. 1 .... 55 J < 



13 10 15 4 6 7 .. 4 3 .. .. 7 4 .. 3 63 



14 4 4 4 .... 1 1 4 1 3 2 6 .. 8 38 ^ 



a 15 6 11 10 4 6 5 6 .. 3 6 6 3 .. 1 .. 1 .... 68 05 



S 16 7 11 .. 7 .. 1 6 .... 3 .... 8 3 47 "S 



"r^J 17 3 .. 12 9 3 .. 3 .. .. 4 .. 2 4 12 .. 3 .. .. 55 >-g 



18 1 .. 12 6 5 6 4 2 15 7 4 53 ^ 



19 6 8 6 5 6 .... 5 .. 3 .. 2 3 11 5 2 1 1 64 *< 



20 2 4 .. 4 .. 3 2 7 .. 4 .. 1 3 .. 3 33 



21 6 11 .. 3 2 1 2 .. 3 3 2 .. 4 .. .. 37 



22 6 .. 2 10 .. 5 1 3 2 .. 5 - 1 .. .. 35 



* Over 25 had germinated but the number was not counted ou this date. 



