316 



Mr. R. H. Scott. The Variability of the [Mar. 27, 



When dealing with the daily mean values for the observatories, it 

 seemed worth, while to append to the paper a notice of the distribu- 

 tion of these mean values. They have been arranged in seven 

 columns according to their heights, 10°'0— 19°"9, 20°'0— 31°'9, 

 32° -0— 39°-9, 40°-0— 49°'9, 50 o> 0— 59° -9, 60°'0— 69°-9, 70°-0— 79°'9. 

 These intervals are naturally unequal, the exigencies of the 

 Fahrenheit scale not suiting the decimal division about the freezing 

 point. 



These figures are given in detail for the different years in Table IY, 

 in order to give a general idea of the character of each year. 



Taking the winters, we see that Stonyhurst had in the severe 

 winter of 1881 four days in January on which the mean tempera- 

 ture did not reach 20°, and had 19 days in all in that month in which 

 the mean temperature did not rise to the freezing point. 



In the same month the number of days with a mean below 32° was 

 higher (21) than at Stonyhurst both at Aberdeen and Glasgow, but 

 the cold was not so intense at these stations as at Stonyhurst, for the 

 number of days with a mean below 20°'0 was less. 



Neither at Falmouth nor at Valencia did the mean ever fall 

 below 20°'0. 



Conversely, as regards higher temperatures, Kew far outstrips the 

 other stations, July showing in the interval of 15 years 35 days on 

 which the mean temperature amounted to 70°' or upwards. 



Table IY. — Number of occasions in each Month and each Year on 

 - which the Mean Daily Temperature reached definite limits. 



Valencia. 



J anuary. 



Year. 



10— 19° 9. 



20— 31° 9. 



3°2— 39°9. 



40— 49° 9. 



50— 59° 9. 



6°0-69°9. 



70— 79° 0. 



1869 









24 



7 







70 







*5 



24 



2 







71 







5 



26 









72 







1 



26 



4 







73 







2 



26 



3 







74 







1 



26 



4 







75 









17 



14 







76 







8 



12 



11 







77 







1 



30 









78 







2 



21 



8 







79 







13 



18 









80 







7 



23 



1 







81 





5 



13 



13 









82 









22 



"9 







1883 







2 



26 



3 







Sums 





5 



60 



334 



66 







