A PHYSIOLOGICAL CHARACTER. 



37 



The mean reaction-times obtained in the tabulation by two- 

 month periods (tables 5 and 6) are used in the plotting of curves 

 (figure 2c), showing graphically the courses of the selection experi- 

 ment with Line 695. 



Table 7 gives in abbreviated form selection summaries of the 

 data for 695 plus and 695 minus by the larger periods (mostly year- 

 periods) into which it was divided in tables 5 and 6; it also includes 

 summaries and results of the "test series" and summaries for selection 

 data for three-month periods during which the test series were con- 

 ducted. In table 7, in the vertical column to the left, are indicated 



Table 7. — Selection summary for Line 695. 



Time period. 



Apr. 1, 1912 



July 31, 1912 

 Aug. 1, 1912 



July 31, 1913 

 Aug. 1. 1913- 



July 31, 1914 

 Test series, 



Aug., 1913.. 

 July 1, 1913 



Sept.30, 1913 

 Test series, 



May, 1914 . . 

 Apr. 1, 1914- 



June 30, 1914 

 Aug. 1, 1914 



July 31, 1915 

 Test series 



May, 1915 . 

 Apr. 1, 1915- 



June30, 1915 

 Test series, 



June, 1915 . 

 May 1, 1915- 



July 31, 1915 

 Aug. 1, 1915 



July 31, 1916 

 Aug. 1, 1916- 



Sept. 2, 1916 



Strain. 



Plus . . . 

 Minus , 

 Plus . . . 

 Minus . 

 Plus . . . 

 Minus . 

 Plus . . . 

 Minus 

 Plus. .. 

 Minus 

 Plus. .. 

 Minus 

 Plus . . . 

 Minus 

 Plus . . . 

 Minus 

 Plus . . . 

 Minus 

 Plus . . . 

 Minus 

 Plus . . . 

 Minus 

 Plus . . . 

 Minus 

 Plus . . . 

 Minus 

 Plus . . 

 Minus 



O 



8-19 

 8-19 

 20-58 

 19-54 

 59-105 

 65-99 

 61 

 57 

 55-67 

 61-64 

 95 

 89 

 90-100 

 86-95 

 106-153 

 100-147 

 142 

 109 

 139-149 

 132-143 

 143 

 143 

 143-153 

 136-147 

 154-195 

 148-187 

 196-203 

 188-192 



T3 oj> 



"o 



o 

 a> o 



o?£ 







3 *» 

 > <o 



-3 m 

 a m 

 •■* a 



51 



61 



251 



217 



361 



304 



529 



467 



72 



90 



1083 



1088 



83 



62 



478 



476 



961 



974 



120 



109 



249 



246 



67 



74 



399 



439 



102 



65 



> 

 <s . 



bfi <n 



a % 



■STS 



4 



2 



4 



10 



36 



31 



44 



28 



2 



1 



89 



76 



20 



17 



65 



86 



122 



110 



16 



21 



43 



26 



10 



11 



31 



42 



6 



a a 



3 O 



3 -a 

 > c 



a c 

 •a oj 



"s-g 



. aS 

 O £• 



9 



/S 



10 



8 



38 



5/ 



133 



J0S 

 4 

 5 



290 



16 

 10 

 49 

 2S 

 67 

 57 

 16 

 6 

 29 

 /6 

 7 

 6 

 34 

 45 

 30 



s a 



302 

 2« 



148 

 185 

 166 

 23J 

 181 

 /7/ 

 169 

 206 

 114 

 75S 

 194 

 269 

 146 



10,8 

 I S3 

 168 

 163 

 12S 

 //7 

 221 

 235 

 103 

 /24 

 156 

 //S 



a 

 3 

 s 

 •a 



<a 



a 

 o 



M . 

 03 & 



s a 



708 

 734 

 403 

 472 

 653 

 65« 

 769 

 837 

 536 

 657 

 863 

 862 

 786 

 772 

 743 

 655 

 900 

 791 

 829 

 652 

 747 

 766 

 772 

 655 

 635 

 6S5 

 732 

 620 





■a 



5 



a 3 



a- 



497.3 

 499.1 



260.2 



207.5 



371.8 



37/. 3 



522.2 



490.6 



296 



2.94 



501 



662.8 



440.2 



368.7 



SOS. 7 



350.1 



351.2 



399.2 



3/7.3 



369 



317.9 



397.9 



336. 4 



291.5 



307./ 



436.3 



285.6 



o 



a 

 03 



259.2 

 SOS. 3 

 182.5 

 187.7 

 253.3 

 «4S-<5 

 284.4 

 282.6 



311.4 



302.2 



225.4 

 262.3 

 222.9 

 216.2 

 279 .4 

 225.8 

 244.3 

 220.1 

 264.5 

 236. S 

 242.5 

 262.8 

 338.6 

 2/2./ 



3 



S3 

 O 



24.49 



;.''/. f-'.: j 

 7.77 

 S.5.9 

 8.99 

 3.54 

 8.34 

 8.82 



6.36 

 6./S 



a 



8 



4 

 17 



J4 



in 



9 



21 



(8 



8 



8 



LM 



j; 



jO a> 



to 8 

 o '^. 

 B A 



Q> M 



■- o 



- /.S 



-37.3 

 + 0.5 



+31.7 

 + 2" 



-6/.S 



- 1.0 

 + 60.0 



- /./ 

 + 81.3 



+ 51.1 

 + 61.5 



-15.6 

 +150.8 



•a 



.-. 

 o 



36. /7 



//.59 

 13.10 



12.14 



S.SS 



10.68 



6.73 

 22.56 



14.08 

 28! 63 



//.77 

 30.2 





Q^ 3 



0.05 



3.2 

 0.04 



2.61 



06 



5.62 



0.16 

 3l63 



2.14 



/.33 

 5.0 



the periods covered by the various portions of the summary; succes- 

 sive columns to the right of this indicate the strain (whether plus or 

 minus); the generations of descent during the period under con- 

 sideration; the number of broods used in selection and in obtaining 

 the data; the average number of individuals per brood of those 

 tested; the total number of individuals tested in making selections; 

 the number of individuals moving to the negative end of the tank; 

 the number failing to respond to the extent of reaching either end of 

 the tank; the average minimum reaction-time; the average maximum 

 reaction-time; the mean individual reaction-time; standard deviation 



