Show Tho Power of Lightning Professor Hoppe reports In the Ar chlv fur Post und Telegraphic a new example of the mechanical power of a lightning discharge In a storm that raged at Klauslhal In the Harz mountains moun-tains u bolt entering a house struck a wooden post on whose top two metallic metal-lic nails onesIxth Inch In diameter were melted No forge could have effected ef-fected this to bring It about an electric elec-tric current of 200 amperes Intensity and 20000 volts tension must have passed through the nails Supposing that the action of the lightning lasted a second thu dynamic power thus developed de-veloped was equal to DOUO horsepower but If as Is much more probable the discharge lasted only a tenth of a second sec-ond we get a rate of work that does not fall short of 00000 horsepower Translated for the Literary Digest |