Meteorological observations and essays / By John Dalton.

  • John Dalton
Date:
1834
Catalogue details

Licence: Public Domain Mark

Credit: Meteorological observations and essays / By John Dalton. Source: Wellcome Collection.

    270/280 (page 244)
    half of the hemisphere, and not yield more light than the full moon ; this arises from the extreme rarefaction of the air, which is almost tantamount to a Torricellian vacuum ; in fact the light of the aurora exactly corresponds with that of the electric spark, when sent through a tube in which the air has been rarefied to as high a degree as can be effected by a good air-pump. N. B. I find from the information of a friend, that the explanation of the lengthened sound of thunder, which I have given at page 208, is much the same as was formerly given by Boscovicu.— See Priestley’s History of Electricity. FINIS. MANCHESTER : PRINTED BY HARRISON AND CROSFIELD, MARKET STREET.