Scientific Intelligence. 265 
demonstrate still further the continuity of the current, the author exam- 
ined its magnetic and physiological effects. Two electro-magnets 
introduced into the circuit supported together 750 |bs., and a vibrating 
hammer apparatus gave regular and very rapid beats but no musical 
tone. When the intermitting spring of the apparatus was removed, 
the conductors held in the hands wet with salt water, and the inductors 
made to revolve three times in a second, strong shocks were felt in the 
arms which however were not sharp and sudden like those produced 
, as Ne 
have shown, when a battery and an interrupting wheel (blitz rad) are 
and constancy to be used in telegraphing, and that it er i? 
pa i 
platinum plates immersed in dilute sulphuric acid, a 
inches of gas were evolved in a minute.» After the plates 
EOOND Serius, Vol. XVIII, No. 53.—Sept., 1854. 
