Influence of Solar Radiation on Plants. 



49 



in the Protestant Episcopal Church. As a fellow-clergyman in 

 that able paper, the New York Church Journal, unites, "the un- 

 certainty of his health for many years past prevented his under- 

 taking the labors of a parish. His gentle, quiet, and deep piety 

 of character won him universal esteem. He was chiefly known 

 by the many works in which he has embodied the history, the 

 topography and the natural endowment of his native State. In 

 natural science, his proficiency was so remarkable that he was in 

 correspondence with most of the leading naturalists of this coun- 

 try and many of those abroad. He received one of the medals 

 of the late French Exhibition in this department. His place 

 thus made vacant in Vermont, it will be hard to fill." 



As an author, he has won high distinction for his researches 

 and the accuracy of date and detail which characterize all of his 

 historical productions. His astronomical and meteorological ob- 

 servations were carefully made and noted, and he was one of 

 the best and most reliable correspondents of the Smithsonian 

 Institution. 



As his life has been chiefly spent in the development and 

 illustration of the natural productions of his native State ; the 

 scientific world, and especially Vermonters, will cherish his 

 memory as that of a man who devoted his life with energy and 

 singleness of purpose to objects of lasting interest and useful- 

 ness to the whole community. 



Art. Till. — On the Influence of the Solar Radiation on the Vital 

 Powers of Plants growing under different Atmospheric Conditions; 

 by J. H. Gladstone, Ph.D., F.E.S.* * 



Since I laid before the British Association my former Eeport, 

 some of the experiments there detailed have been repeated, and 

 the investigation has been pursued further in the same direction. 

 I have the honor now to present the results which have been 

 obtained. 



The experiments about to be described were conducted, not 

 as before at Stockwell, but in Tavistock Square, London. The 

 locality was not quite so favorable to the growth of plants, but 

 they had always the advantage (unless otherwise stated) of stand- 

 ing on tables at the windows of a large upper room having a 

 southeast aspect, so that they obtained the full benefit of the 

 morning and noonday sun. The apartment was never artificially 

 heated, bat in the winter time it must have been a few degrees 

 higher in temperature than the external atmosphere. 



* From the Report of the Twenty-fourth Meeting of British Assoc., held at 

 Liverpool, Sept. 1854; p. 373. London, 1855. 



SECOND SERIES, VOL. XXII. NO. 64. — JULY, 1856. 7 



