534 



TABLE II. 



Number of observations without any visible ozone. 



Mean amount of ozone with the box suspended at the height of 



25 feet. 



1859. December 24 hours' exposure =3*0 



1860. January... 24 hours' exposure =3'9 

 February 24 hours' exposure =3*7 

 March ... 24 hours' exposure =5-9 



48 hours' exposure =5'0 

 48 hours' exposure =4*5 

 48 hours' exposure =5-4 

 48 hours' exposure =6'4 



Mean amount of ozone with the box suspended at the height of 

 40 feet, March 1860, with twenty-four hours' exposure =7*1. 



X. " On the Temperature of the Flowers and Leaves of Plants." 

 By E. J. LOWE, Esq., F.R.A.S., F.L.S. &c. Communicated 

 by THOMAS BELL, Esq., P.L.S., V.P.R.S. &c. Received 

 April 16, 1860. 



(Abstract.) 



The present observations were made in order to ascertain whether 

 different plants and flowers influence the temperature of the air 

 immediately over them. The author was induced to undertake the 

 inquiry from what he had noticed whilst making observations on the 

 fall- cloud, or white mist of the valley, as it is usually called. 



In the autumn of 1858 it was repeatedly noticed that vapour 

 formed first over those fields from which hay had been gathered in 

 the summer, and which were covered with a good crop of after -math. 



