Sentences with phrase «lengthy period of observation»

Not exact matches

Lengthy series of observation times show that the total amount of snow in the Northern Hemisphere has declined in the spring period and that the melting of the snow has started earlier in the same period.

Journals of observations on the quantity of rain, and degree of heat, being lengthy, confused, and too minute to produce general and distinct ideas, I have taken five years observations, to wit, from 1772 to 1777, made in Williamsburgh and its neighbourhood, have reduced them to an average for every month in the year, and stated those averages in the following table, adding an analytical view of the winds during the same period.