414 Profs. Percy Franklarid and Marshall Ward. 



Or, reckoned back : 



143 -7572 M = 12.27 P.M. 1.0 P.M. = 33 minutes at 3131 '25 C. 



72 -0 36 = 11.52 A.M. 12.27 =35 31 30 '75 31 0. 



Segment B. 

 Doubling periods : 



20 -2540 '5 (i = 11.30 A.M. 12.0 noon = 30 minutes at 31 -1 30 -75 6 C. 

 40 -5 81 -0 = 12.0 noon 12.35 P.M. = 35 30 -7531 C. 



Reckoned back : 



128 '2564 n = 12.23 P.M. 1.0 P.M. = 37 minutes at 3131 -25 C. 

 64-0 32 = 11.53 A.M. 12.35 = 42 31 30 '75 31 C. ' 



Segment a. 



(From 12 noon to 1 P.M.) 

 Doubling period : 



22-545 v = 12.0 noon 12.35 P.M. = 35 minutes at 30-7531 C. 



Or, reckoning back : 



73 -2536 -5 /x = 12.27 P.M. 1.0 P.M. = 33 minutes at 3131 '25 C. 



Segment b. 



(From 12 noon to 1 P.M.) 

 Doubling period : 



22 -545 fi = 12 noon 12.41 P.M. = 41 minutes at 30-7531 C. 



Or calculated back : 



67 -533 -75 /x = 12.26 P.M. 1.0 P.M. = 34 minutes at 3131 -25 C. 



Segment c. 

 (From 12.30 to 1 P.M.) 



This segment did not reach the doubling point, but, if the curve is 

 prolonged to 1.3 P.M., we get it, which gives 

 Part calculated : 



22 -545 fji. = 12.30 P.M. 1.3 P.M. = 33 minutes at 3131 '25 C C. 



V 



Segment d. 

 (From 12.30 to 1 P.M.) 



Here, again, the doubling period was not reached, but prolongation 

 of the curve to 1.10 P.M. gives 

 Part calculated : 



49 -599 /* = 12.30 P.M. 1.10 P.M. = 40 minutes at 3131 -25 



