266 - Scientific Intelligence. 
decomposing cells in which the electrodes were. lead, silver or nickel 
in dilute sulphuric acid, or zine in solution of caustic potash. Two 
of zinc in a solution of caustic potash give off no ozone; the secondary 
ing cell 1S 
a Pogg. Ann., xcii, 1, , 
a vanic reduction of metallic chromium.—BuNnsEN has commu 
nicated the results of some further investigations in electrolysis and bas 
shown how chromium, manganese, and several other metals may read- 
