CONTENTS. 
VIII. JV * otice on the Iguanodon, a newly discovered fossil reptile, 
from the sandstone of Tilgate forest, in Sussex. By Gideon 
Mantell, F. L. S. and M. G. S. Fellow of the College of 
Surgeons, &c. In a Letter to Davies Gilbert, Esq. M. P. 
V, P. R. S. &c. ^c. &c. Communicated by D. Gilbert, Esq. 
179 
IX. An experimental enquiry into the nature of the radiant heat- 
ing effects from terrestrial sources. By Baden Powell, M. A. 
F. R. S. of Oriel College, Oxford. Communicated by J. F, W. 
Herschel, Esq. Sec. R. S. 187 
