By CHARLES K. GALLAGHER, Washington, N.C.


Any convenient number of percolators, made of rough boards, arranged
over a trough after the style of the old fashioned "lye stand,"
similar to the figure. Into these was placed the earth scraped from
around old tobacco barns, from under kitchens and smokehouses. Then
water or water and urine was poured upon it until the mass was
thoroughly leached or exhausted. The percolate was collected in a
receptacle and evaporated, the salt redissolved, filtered, again
evaporated, and crystallized from the mother water.

[Illustration]

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THE TELEMETER SYSTEM.

By F.R. UPTON.


In this paper, read before the British Association, the author
explained that the "Telemeter System," invented by C.L. Clarke, of New
York, is a method by which the slow movement of a revolving hand of
any indicating instrument may be reproduced by the movement of a
similar hand at a distant place, using electricity to convey the
impulse. The primary hand moves until it makes electrical contact,