280 Proceedings of the Royal Irish Academy. 



3. ZUt May, 1879 :— 



Hour. 



n 



Q 







oo°-o 



92°-75 



1 



39 -8 



68 -25 



2 



79 -5 



49 -50 



3 



119 -2 



37 -50 



4 



159 -0 



26 -75 



5 



198 -7 



21 -00 



From these data I find — 



One hour, /= 1 ^ 5885 



Two hours, ,, 5742 



Three „ ,, 597a 



Pour ,, ,, 5799 



Five „ ,, 6067 



Mean of all, f = ^tz^- 



' '' 5893 



4. \Zth June, 1879 



Hour. 



n 











oo°-o 



100°-00 



1 



39 -8 



71 -75 



2 



79 -5 



54 -50 



3 



119 -2 



39 -40 



4 



159 -0 



31 -25 



From these data I find — 



One hour, /= 1 ^ 5437 



Two hours, ,, 5940 



Three „ ,, 5804 



Four „ „ 6200 



Mean of all, -^"5845* 



