Octob. 
— this Courfe it is lodged at various Diftances in 
This is the Courfe of Juices in Plants, and in 
thofe Bladders, where the Glands are fituated ; and | 
there it becomes altered according to the general 
Nature of the Plant, or of the Parts to which | 
it is to be fent. oe 
That the Glands perform this, without regard 
to the Nature of the Juices themfelves, is evi- 
dent: for Water alone will fupport many Plants, | 
and each will have its Flavour, Virtues, Co- 
lours, and all other Qualities : 
Spurge, a 
~ which the Juice is white, and in the other yellow ; 
and a third of any common Kind, with watery 
Juices, will be fupply’d in the fame fet and. 
by the fame Soil with them. | 
Hence we fee, that though there be fomething 
in the Nature of the Soil Sait regard to this | 
Change of Colour, there is more in the Vefiels of | 
the Plant; and this gives the rational Method of 
attempting the Variegation of Leaves by Art. 
The Principles will thus rife one from another in 
a Courfe of regular Enquiry; and. the Operations 
the fame Piece of | 
Ground fhall give Nourifhment to a Plant of 
and another of Celandine; in one of { in the human Structure. 
of the Veffels and Glands in Animals will beft 
explain them. 
As we have feen i in Plants that the baie Nou- 
_nifhment forms various Juices, we find in Anj- 
mals that from the fame F ood, according to the 
3 _diftemper’d or healthy State of the Body, various 
Fluids are elaborated: yet there is fomething in 
the Nature of the Food that may aét in concur- 
rence with the other Caufes; and more in Medi- 
. cine. 
As we know what will remove a Biforder: we 
alfo know in fome degree what will bring it on, 
The Green eee and 
the Jaundice difcolour the Skin, and the white 
and yellow Stains on the Leaves of Plants, may 
be confider’d as their Chlorofis and Jaundice. We 
know better how to remedy, than how to bring on 
thefe Difeafes, even if we could be eine to 
do it in ourfelves; and it is fo in Plants. 
We know that by removing a variegated Tree 
into a rich Earth, we can. make the Leaves all 
green: this proves that a bad Soil had great 
Share in changing them yellow; and hence we 
are led to the rational Practice. 
POLOTer Torer aT eT oroToroToTorey: Tororo rOrOr OTR Tero srer OreT Oper Star orot fre erore: 
CEA P. 
Ill. 
Of the natural V ariegation of LEAKE 8: 
{ % JE fee in the wild State the Leaves of many 
» V. Plants ftain’d in the fame Manner that 
they are in Gardens; and ’twas this natural Ac- 
cident that firft brought them thither. Thofe 
who have written on the Subject, have too rafhly 
drawn general Conclufions from a few Inftances. 
It is the general Doétrine, and it is counte- 
~ nanced by Mr. Ray,* that variegated Shrubs 
 ferves its Variegation better from. Seed. 
may be propagated by Cuttings, or Layers, but 
not by Seeds; for that the new Plants raifed 
from Parts of the old, retain the Variegation ; 
but thofe from Seed rife plain. 
This, however, is not true. I have two 
Years fince raifed variegated ftinging Nettles 
from the Seeds of a variegated wild Plant; 
and have found that the ftain’d Dulcamara, tho’ 
no Plant grows fo freely from Cuttings, pre- 
In thefe 
Cafes a proper Soil is effential ; and other Articles, 
which we fhall lay down when we come to the 
Practice. 
The Gardeners + have alfo found this, for they . 
to the Nucleus of the Seed, in a Condition. to 
have diforder’d the minute Glands i in that wonder- 
ful Organifation. 
Seeds of plain Plants will fometimes alfo in 
the fame Kinds of Soil, and with the fame 
Management, produce ftriped ones. This is the 
Gardener’s great Source. of Hope: this he is to — 
endeavour to make conftant, and univerfal; and — 
in that Courfe to follow ftriétly what he fees in- 
fluence the Plants in Nature. 
The Jaft Year I traced with Care the feveral 
Accidents from which the ftaining might feem to 
have rifen in two Plants, a Dulcamara, and a 
Nettle. . : 7 | 
The Dulcamara had rifen from Seeds of a 
Plant of the common Kind, near Denham, upon 
fome Rubbith of an old Wall, thrown on the 
Bank of the River. 
The Water had been higher than ordinary when 
the Seed ftruck; and afterwards had fallen confi- 
derably below the Place; there was not a ftain 
upon the Original, or Parent Plant, but this 
affirm, that the variegated Sycamore rifes variegated | had many of the Leaves fpotted with a faint 
from Seed; to raife it this Way a proper Soil is 
an effential Article; but its being practicable with | 
that Affiftance, fhews that the Diftemperature is 
very univerfal: for it muft have infected even 
the Pith of the Stem, and thence fpread itfelf 
ail 
The Nettle grew, and I think {till grows near 
Highgate, upon the dry Bank of a Ditch, by the 
Road; which, on Examination, -I found com- 
pofed of gravelly Earth, and Lime Rubbith from 
* Hiftoria Plantarum, Vol. x. Pe 4I. 
+ Miller, who, I fuppofe, has try’d it. 
an 
Odtobs, 
. 
