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Elymus arenarius

July 28' 9° 5' after sponging a space of 4 leaves put on fresh- pure water on 2, & salt water on two.

Of the latter one was well involuted at 11° 30; & the other at 4°.

July 29th 9° 1 leaf with pure water is dying

(B) ― 8° 15' 1 of the leaves with salt-water had almost opened so; but by 10° 30' had again become involuted. Even pure water causes some involution.

July 30th 9° Both leaves with salt closely involuted & yellowish & I do not doubt killed

(July 31st 9° completely yellow & dead.)

July 30 9° — Cut off the dead leaf, & cleaned another & put on A pure pure water, it is the 2d from inside. (N. B pure water certainly causes some involution­) which disappears

Aug 3d. 10° The pure water leaf seems a little browned. —

Aug 1'. 8° 30 — Clean Pinned down 2 new & uncleaned leaves & put on sphere spheres of salt-water; in a hour or two leaf closed & at 4° 30 opened again. Also a leaf with pure water which was partly closed this morning is now 4° 30 quite open.

Aug. 10 The spheres have no injured leaf in the least.

(one of the leaves with fresh water has several times become involuted & then flattened itself again)

(B

Elymus arenarius

Aug 2d. 9° 37 spheres of water on uncleaned leaf (C) on lower stage to see if will be involuted.

Aug 15. The spheres of salt-water, (though once or twice the water evaporated & crust of salt lost) have produced not the least effect.

Leaves A & B very slightly yellowish- browned where pure water lay, but I doubt whether much or at all injured. — C. not in the least affected.

Aug 18 The leaf A which was pinned down on July 30th & was freed on the Aug. 15th is now involuted & dying, so it appears that fresh-water does somewhat injure leaves. —