Clipart tagged: ‘dahlia stem’

"Apparatus to measure root-pressure. T, large tube fastened to the stump of the dahlia stem by a rubber tube; rr, rubber stoppers; t, bent tube containing mercury; ll', upper and lower level of mercury in T." -Bergen, 1896

Root Pressure

"Apparatus to measure root-pressure. T, large tube fastened to the stump of the dahlia stem by a rubber…

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