deals with the variation of thunder over longer periods.
are the amplitudes of the component harmonic waves of periods 24, 12, 8 and 6 hours; al, a2, a 3, a 4, are the corresponding phase angles.
As a boy he worked on his father's farm, attending school for only brief periods, and in 1808-1812 he lived at Wheeling, Virginia (now W.
quennial periods in lb.
For the next week, Alex continued to wake up more frequently and stay awake for longer periods of time, but he still didn't talk – didn't even try.