T. Gaffield on the action of Sunlight on Glass. 317 , 
crown glass, 
Should plate glass be required, the most permanently endu- 
dee ‘ * ’ 
. Eeapenice, and an excellent quality of German crystal plate, 
1 a a long established factory in Hanover. 
o ig say here, however, that it is not the place where 
whe ass is made, which determines tts good character, but the 
nites materials and the superiority of its manu- 
fa 
: ee 
=P 
1 = me ap Saget titaetan 
Hal iis LUCIT MliAvureuL Uatcll, 
= Sg 
hag any results given with one set of samples might differ 
be ah: ose made with another set, from the same manufacturers. 
experim reason, in noticing any differences which may occur In 
"ei ments made by any of our readers, this fact should be 
Pi 41 
ms might be good for one year or more, and then become very 
‘Nuch injured for photographic effects, by the change of color to 
or pink by sunlight. Noiiagt aot 
