» 316 T. Gaffield on the action of Sunlight on Glass. 
which it may be hoped are even gaining upon that most essen- 
tially conservative establishment, our gigantic and, I might al- 
most add, all-grasping British Museum. The large sums annu- 
ally voted for its support by the nation justify, indeed, not only 
the exhibition on a most extensive scale of attractive specimens 
fully as to the pecuniary value of any expected return; and to 
authorize the consigning to the dust-cart all absolute rubbish 
cece EE 
Ant. XXXIIL—The Action of Sunlight on Glass ; by THOMAS 
GAFFIELD. 
(Concluded from page 252.] 
THE comparative power of glass of different kinds to transmit 
percincg rays I have tested, by placing underneath pieces 
each iv : ; 
e kind of English plate, and one “17, 
bout in the order which I have named 
