BIOLOGICAL DUME'IN VOl. XXIV 



CURVE 7 



T t T 



2 3 4 5 6 7 8 O 10 II 12 13 14 15 16 <[ 18 19 20 21 22 23 25 26 27 28 29 30 31 

 June 21 24 27 30 July 3 6 g 13 15 18 21 



23456 7 8 O 10 II 12 13 14 15 16 <[ 18 19 20 21 22 23 25 26 27 28 29 30 31 

 Aug. 19 22 25 28 31 Sept. 3 6 9 12 15 



LIIAIE AND JUST 



