110 G. H. KNIBBS. 



in which q is the frequency of suicide per diem per million 

 in the Australian Commonwealth and t is the temperature 

 in Fahrenheit degrees. This curve is plotted as curve 2 (c) 

 and it will be seen from the diagram, that if it be moved 

 about 9 or 10 days to the left (19° 48' - 10° 44' = 9° 04') it 

 is practically coincident with the temperature curve. This 

 identity is purely empirical. The discussion as to whether 

 this relation can be rationalised is really an extra-mathe- 

 matical one, and is outside the scope of the present paper. 



17. Conclusion.— The formulae given for deducing the 

 constants of the several equations will enable periodic series 

 to be conveniently applied to the discussion of appropriate 

 statistical results, without involving a prohibitive amount 

 of labour, and will yield expressions that reproduce the 

 data exactly, while giving instantaneous values through- 

 out their whole range. The illustrations are intended only 

 to exhibit the mode of application of these formulae. 



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