92 



DR SUTHERLAND SIMPSON AND DR J. J. GALBRAITH ON 



Noon 



4 

 2 



38° 



4 



2 



37° 





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39° 



12 123 456789 10 11 12 123456 789 10 11 12 Hours 



Fig. 10. — Mean diurnal curve of D for Periods I. (continuous line), IV. (interrupted 

 line), and V. (crossed line). 



a.m. Noon p.m. 



38° 



8 



6 



4 



2 

 37% l 





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\ v ' 7 



V^I/ 





12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 Hours 

 Fig. 11. — Mean diurnal curve of E for Periods I. (continuous line), IV. (interrupted 

 line), and V. (crossed line). 



a.m. Noon p.m. 



4 



2 



88' 



8 

 6 

 4 

 2 











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/ 



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k 

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 1 













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12 123456789 10 11 12 123456789 10 11 12 Hours 

 Fig. 12.— Mean diurnal curve of F for Periods I. (continuous line), IV. (interrupted 

 line), and V. (crossed line). 



