TRANSACTIONS OF SECTION A. 



643 



effects of insolatiou the upper part has been omitted from the diagram. The 

 temperatures of the isothermal layer obtained last year in the corresponding period 



PH.3 



200 



300 



I 



C. — Crinan. 

 M. — Manchester. 

 L. — Limerick. 

 P.H.— Pyrton Hill. 

 D. — Ditcham Park. 



1.— July 27. 

 2.— July 28. 

 3.— July 29. 

 4.— July 30. 

 5.— July 31 

 6.— Aug. 1. 



■were about 230° or 240°, which is considerably above those found this year. 

 The two minima of 204° are the lowest that have been obtained in British, 



TT 2 



