153 



Art. IX.— Report of the Committee appoi?ited to continue 

 the Meteorological Observations, on the 21st of 

 March, June, September and December. 



The committee having delayed their report of the observa- 

 tions made in June, in the hope of receiving additional re- 

 ports, until the beginning of September, determined to omit 

 presenting them to the Institute, or having them published, 

 until they could add to them the observations for September. 

 It will be seen by the tables annexed, that the number of ob- 

 servers who are willing to contribute to this collection of ma- 

 terials is considerably increased ; and the committee entertain 

 the hope, that as the plan becomes more generally known, it 

 will induce additional observations. 



The tables of observations made by Sir John F. W. Her- 

 schell, for December, 1835, and March, 1836, have been in- 

 cluded, as, in addition to the interest which would naturally 

 be felt in examining observatiocs made at the southern ex- 

 tremity of Africa, they possess the higher interest of being the 

 work of the distinguished individual by whom this system of pe- 

 riodical observation w^as suggested. The Actinometer which 

 is spoken of in his tables, is an instrument invented by him, 

 for the purpose of ascertaining the amount of solar radiation. 

 A description of it, and the mode of using it, may be found 

 in the Report of the Transactions of the Third Meeting of 

 the Britisli Association for the Advancement of Science. 



MATTHEW HENRY WEBSTER, 



PHILIP TEN EYCK, 



JOHN V. L. PRUYN, 



HORACE B. WEBSTER, 



Committee. 



