468 C. E., Fritts—New Form of Selenium Cell. 
After some speculations as to whether the foregoing actions 
are properties of selenium, or are produced by the arrangement 
of selenium in contact with substances so widely separated 
from it in the electrical scale, I observed that it is at least evi- 
dent that the peculiar construction of my cells causes these 
actions to be manifested many times more powerfully by them 
than by cells of other forms, and then inquired: If it be -possi- 
e, by such simple ‘means as are employed in my cells, to 
obtain these results, may not means be found to still further 
facilitate these manifestations, and so intensify and exaggerate 
the results,—and even to obtain others yet unthought of, and 
possibly still more surprising 
8d. Still I have found that the kind of battery employed has 
a great deal to do with the performance of the cell. Take 1ron 
cell No. 1 as exemplifying this. This plate is one of the best, 
having given.a change of &8 per cent, has been used in ‘almost 
every conceivable way, and always proved good. Yet on re 
_ sensitiveness. “1 
Brass cell No. 6, which has given 85 and 88 per cent cme 
Leclanché battery, appeared to be almost worthless with the 
bichromate cells, showing but little sensitiveness to light,—™ 
one measurement, none at all; and in another, its resistance 
was actually less in dark than in light,—the figures being 2 
and 750 ohms, respectively. But on putting it with the a 
clanché, its action changed, it became fairly sensitive to. light, 
and behaved more like its old self. ai 
Brass cell No. 12 alsé failed with the bichromate battery 
