l the Indian plants hitherto met with, have been tabulated; when
all their respective heights at which they have been found have been
determined; when their more strictly geographical sites have been fixed;
when we have some data as to the quantity of humidity pervading their
localities; then, and not till then, shall we be able to legislate for
the geography of Indian botany.

The Botanist who travels without the means of determining these points,
destroys half the value of his collections.

_December 16th_.--Yesterday was very raw and cloudy, to-day clear as
usual, towards 1 P.M. a strong north-east wind occurred for a short time
as usual, because once or twice before, it occurred after threatening
weather.

_Rationale_.--It blows from the nearest snow to supply the rarefied air
in the valley heated by the sun, even now tolerably powerful; it blows
for some days so long as a vacuum is formed, and discontinues when clouds
again appear; hardly so, as it before only blew for three or four days,
although several more elapsed before clouds re-appeared: it may however
be dependent on each fresh fall of snow in the hills.

_26th_.--Cloudy morning, forenoon fine, clear and calm.

Mosses are the analogues of Zoophytes; these analogies are to be looked
for in the most striking and most constant parts of the organization of
the divisions of nature.

Marchantiaceae are the representatives of radiate animals, another reason
why Jungermanniaceae are to be separated from them.

Hence, Radiata, = Marchantiaceae.
" Zoophyta, = Musci.

I am quite convinced that the true subordinate groups of Acotyledones are
far from being discovered.

Are the sheaths found on certain radicles strictly confined to
monocotyledonous plants. There is this certain about them, that they
depend on the presence of vascular tissue, from which the radicles or the
divisions of each root originate: see young Hyacinth roots, grown in
water.

Although the sheaths cannot exist without a positive cuticle, their
existence does not depend so much on its presence as on the direction of
the adhesive powers of its component parts: witness certain forms of
Marchantiaceae, and the vaginate forms, as Azolla, Lemna, etc. Also the
sheath may not have adhesive powers at its apex to prevent the escape of
the radical at that point: witness Hyacinth roots? We may imagine a case
in which the primary radicle may be without a sheath, while its divisions
shall ha