e instrument; thewire which is common to both cell and electrode is attached to themiddle binding post, while the third wire is attached to the right-handbinding post. The ends of the wires should be scraped bright with adull knife, in order to insure good electrical connections with the bind-ing… … .biG. 3.—Sectional view of the soil, with electrodes and cell properly connected to the hygrometer. handle down so as to keep the battery switch closed, the pointer isrotated to either right or left until the position is found at which thenote in the telephone receiver is no longer heard. On…
Soils Analysis · Electric apparatus and appliances
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