Sentence Examples


  • The invention of the portable electrometer and the water-dropping electrograph by Lord Kelvin in the middle of the 19th century, and the greater definiteness thus introduced into observational results, were notable events.
  • Whilst no small amount of observational work has been done in these new branches of atmospheric electricity, the science has still not developed to a considerable extent beyond preliminary stages.
  • Before considering observational data, it is expedient to mention various sources of uncertainty.
  • Owing to observational difficulties, the exact measure of success attained is a little difficult to gauge, but it seems fairly certain that raindrops usually carry a charge.
  • It became fairly certain, however, that theory had outrun observational work, and that the latter must again receive renewed attention.

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