jufimt ^cctmt "cincerMfk^ the E^ifieme of Veins in all kind 
§f Plants 5 together with a Difcovery of the MembramusfuU 
Jtanceof thojeVetns^ and ef Jome ABs in Plants re[embttng 
thofe Seftf^ n m alfb fthe^^^eemfit of the Venal "juue 
in Ve^t^ta mthWBlhod'of Mi^ais^^&c^ Communicated 
hj Mr. Lifter in a Letter ofjatmar l6ii^ and exhibited u 
jhe Society. 
SIR,' • 
TEfeave. formerly given you certain reafons for the 
J Exiftence of Veins ^ Caoalogous to thofe io Atii- 
mals) in ali Planes whatfoerer^ not Muftiromes excepted ; 
To which we might add others of later notice 3 as the skin 
of a plant may be cut ftieer off with part of thefpongy p- 
renchyma; and no figos of Milky juice follow, that is, no 
breach of a vein. - Again,we have ftdpt ^he PJaAt of its 
skin, by pulling Ji; up by the i*ootSj arid expoBng ittathe 
wet weather^ untill it became flaccid as a wet thong, with- 
out any injury to the VeinSjW^iichyet upon incifion would 
freflily bleed. Thefe Experiinents, 1 fay, make againft 
the general opinidn of one only fap loofely pervadiog the 
whole plants like water in -^^^ 
And though we have maHe thefe and many otherEx- 
periments to facilitate an ocular demonftration of thefe 
^ Veins ; y^r we have^t been able to^^^ it ta our tnind} 
arid fu£§ei9- them ^s^riaM^dly to ouir eye as we could wilhj 
fbra^&du^^ and a/minute and 
"accurate difcovery. of all the particular Accidents belong- 
ing to themas fuck vefleli. Xhis^I fay^is a work of much 
labour and pitience § and that which renders matters very 
difficull^;%^tlie^kflDite^ilnb^ finallnefkand; perplexity 
, of thefe PlaotS; 
In the Tranfverfe cuts of Plants^ we fee as it were a cer- 
tain Order and Number of the bloody orifices of diffefte 
, veins. We obferve aifo in a Leaf, which we take to be tne 
"fimpleft part of a pkc^^- ^. 
