CONTENTS 
BC 
SUPPLEMENT TO VOL. XXXVL 
I. — On the measure of moving force. By Mr. Peter Ewart, - 2^ 
II. — On a new phenomenon of the electric column, produced by the sun- 
mys.- ------- 3Q7 
III. — Letter from W. H. Wollaston. M. D. Sec. R. S. together with a report 
of Mods. Biot, of the Imperial Institute of France, upon perisco|MC spec- 
tacles. - - - - - - - 
IV. -- Observations relative to tlie near and distant sight of different persorw. 
By James Ware, Esq. F. R. S. From tb« Phil, Trans, foi’ 1813. 32» 
