us to those of the nomena of brain construction? We need something more This electroscope has with pith balls suspended by linen threads. If this arrange- than a report of what trustworthy men think they see; and ment be placed near an insulated conductor charged with that something is the… … without the slightest variation in diameter, until it branches in the ground. Up to this point its circulation is down- great sensibility. It might be termed a kind of electrical ward from the parent stem: but now all is changed. It microscope. ceases to be aroot, and becomes a stem, growing and…
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-19-2.webp)
