Show bigl tutor g s power professor hoppe reports in the archly fur post und telegraphic a new example of the mechanical power of a lightning discharge in a storm that raged at Klaus thal in the hart mountains a bolt entering a house struck a wooden post on whose top two metallic nails one sixth of an inch in dia diameter moter were melted no forge could have effected tills this to br ng it about an el electric current of amperes antens ity and 20 volts tension must have passed through the nails supposing that the action of the lightning ning lasted a second the dynamic power th thus us de was equal to 5 horse power but it if as is more probable the dis charge lasted only one tenth of a sec see ond we get a rate of work that hat does not no tall fall short of 60 50 horse power |