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1881 Roots — Absorption — Euphorbia (peplus?)

July 28 — Dug up carefully & put earth in tub of water a small Euphorbia growing in Potato-field & added old sol. of C. of amm (2 gr. to 1 oz) to roots, after looking at them first in water — After about 1 hr the contents of many of the superficial cells contained dark brown granular masses, which did not exist previously

These squarish masses form row of 2 or 3 to 18 —

Lower down the square becomes suddenly less dark & then suddenly still paler & granular. — The colourless cells between brown, had, I think, contents [illeg] aggregated. — Left in sol. for about 8° 30 to 4° 30' & no further change was visible. ─

No movement seen, but root too opake.

July 29th 8° a.m same specimen — no marked change—

The tips of 3 roots examined, all presented the same appearance — Darkest granular matter always near apex of root, but not at actual apex. —

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Euphorbia

1881

July 29th — examined some fresh roots — As before square or sub-spherical brown masses formed within root-cap, where before the cells contained much transparent colourless matter—

This was caused by drops of (2 gr to 1 oz) added to edge of covering glass. It is odd how in all cases a whole row of cells contain granular matter after addition of C. of ammonia, & then abruptly cease; the cells in same row remaining colourless & transparent, but with the primordia utricle somewhat contracted; I suspect that this is an analogus phenomenon.

The dark square opake masses are clearly only the same granular matter consisting of minute spheres, but more numerous, more aggregated & browner. — The cells with pale granular matter extended far up root.)

I then added small drop of sol. of 1 gr to 1 oz. to edge of cover-glass, with water beneath, & after 5' very many cells contained granular matter, & these cells were certainly before quite transparent /over

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with no granular matter — I think that the granulation travelled up from apex of root, but am not sure, process was so rapid —

I saw no flashing from cell to cell.—