The microphonic currents are intermittent or pulsatory, and always flow in the same direction.
"Scientific American Supplement No. 822" by Various
The latter had a curious, irritating effect on Nasmyth, who hitherto had scarcely noticed the insistent pulsatory clamor.
"The Long Portage" by Harold Bindloss
Suddenly a sharp, pulsatory roar came out of the dark.
"Johnstone of the Border" by Harold Bindloss
The considerations which have just been set forth have led to a third hypothesis, that of pulsatory climatic changes.
"Climatic Changes" by Ellsworth Huntington
It is evident that a pulsatory as well as an alternating current might be used to drive or operate the motors above described.
"The inventions, researches and writings of Nikola Tesla" by Thomas Commerford Martin