578 T. H. Morgan and N. M. Stevens. 



Table XIV 

 (8 hours). 



a I 2, S' 



I 2 2- iJ a 2. a 



/ a a 5/ 2/ 



t i i i 



Table XV (12 hours). 



Table XVII (24, hours). 



Table XVIII (.36 hours). 



S i \i 



|3 \f "/ 



Table XVI 

 (18 hours). 



Table XX (check). 



Table XTX (48 hours). 



