378 
REPORT — 1854 . 
under the colourless and the blue, while the seeds under the obscured yellow 
had an unhealthy look. On the 4th of May long etiolated leaflets were found 
in the dark; under both obscured glasses the wheat had also shot up long 
leaves; under the red and yellow glasses there were plumes of 1 or 2 
inches in length; while under the colourless and blue they only reached 
half an inch. The wheat-plunts under the colourless glass then began to 
grow more rapidly, and soon gained the advantage of those under the blue, 
and still more of those under the red. On the 8th they measured 3 inches, 
while those that had grown in the dark measured 6. 
On the 12th the wheat-plants were more fully examined, and drawing* of 
them were made. It was then found that under the colourless glass teu of 
the twelve seeds hud grown. They presented very uniformly the appearance 
given in Plate IV. fig. i, —leaves erect, of a full green colour, from 4 to.' 
inches in height, roots long and thin, five in number, taking firm hold of the 
brick. They Imd no side rootlets, but were fringed with hairs. Under the 
blue glass, the wheat appeared like that under the colourless, but smaller. 
Under the rod, ouiy four plants gr ew like fig. 1, and they were not so regol.u 
in form, size, or general aspect as those under the colourless glass. Font 
others had grown somewhat like fig. 2, where there was this peculiarity,— 
the green stalk had been unable to burst the transparent membranous sbeat. 
and had forced itself out in a kind of loop, at that part where the oluat• 
sprung out of the seed. The roots were generally flaccid. Under the yellow 
glass, the radicles were so strong, and bent so decidedly downwards, that ic. 
nosed the seed completely on end; they were thickly covered with 
1 he stalks were short and strung, and generally bent in the manner repuj 
rented m fig. 3. Under the obscured colourless glass only seven 
germinated: they were all like fig. 4. The leaves were of a P"f ° 
colour, and had not succeeded in bursting the membranous sheath; t e - 
were very long, Under the obscured yellow glass, the plants wri 
greener colour than the preceding; six of them were like fig-* e L 
that the leaves were very much taller, perhaps 7 inches high' W' . 
all the p ants were weak, and of a very pule green colour, w® J |ikl . 
the radicles had many rootlets branching out from them ; >°“ r ^ 
hg- 5 ; two others were smaller and had second leaves, while othei » 
very short in the leaves. . 
, ,,u f> plants under the colourless glass continue ^ ^ 
heakhdy : hairs along the roots became very long and thick.« lef 
22nd of May, ramifications of the rootlets began to appear. 1 l‘ e P . p m |,-; 
the blue did not continue so healthy, imr did those under the rea. 
the yellow glass, both the upper plant and the roots continued ' ^ 
Under the obscured yellow glass and in the dark, the plants also ^ 
glowing. On the 26th, a more full examination and fresh r g 6. 
made. Under the colourless glass there were ten wheat pi®#® *e:r 
generally 8 or 10 inches in height. Under the blue 
several very tlm, weak plants, only about 2 inches high. L 0 f thru' 
SanJi T| deVd0|,mC,,t was to the ex,tmt of fig * 7 ’ 'J 1 , 116 breaking ,l ' 
p ants. The rest that were growing had not succeeded w b “ ^ 
the v r ,? noU8 8 beath, but were contorted ill their efforts to e? I • [gj,; 
» tlm '" bad grown like those under the 
three others were not so fully developed, while the remaining ° r „n 
fiooe X; "1° «>««* bL*. gi*» «he >■ 
since May 12th. Under the obscured yellow, 1 found six P la,,t g la=* 
hn/ rh dark> the .P , “ nls had grown much as under the obscured J 
but they were still longer, weaker, and paler in colour. 
