Identifier: vegetablestatick00hale (find matches)
Title: Vegetable staticks, or, An account of some statical experiments on the sap in vegetables : being an essay towards a natural history of vegetation : Also, a specimen of an attempt to analyse the air, by a great variety of chymio-statical experiments, which were read at several meetings before the Royal Society
Year: 1727 (1720s)
Authors: Hales, Stephen, 1677-1761 Gribelin, Simon, 1661 or 2-1733, engraver Royal Society (Great Britain) Burndy Library, donor. DSI
Subjects: Plant physiology Air
Publisher: London : Printed for W. and J. Innys ... and T. Woodward ...
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Biodiversity Heritage Library

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
for 3 inches length to r. I then fil-led the tube with water, which was 12 feetlong, and I inch diameter, having firft cuta gap at y thro* the bark, and laft years wood,12 inches from the lower end of the ftem :the water was very freely imbibed, viz. atthe rate of 3 + i inches in a minute. Inhalf and hours time I could plainly perceivethe lower part of the gap y to be moifterthan before; when, at the fame time, the up-per part of the wound looked white and dry.Now in this cafe the water muft neceffa-rily afeend from the tube, thro the inner-moftwood, becaufe the laft years wood wascut away, for 3 inches length all round theftem 5 and confequently, if the fap in its na-tural courfe defcended by the laft years ring-let of wood, and between that and the bark(as many have thought) the water fhouldhave defcended by the laft years wood,or thebark, and fo have firft moiftened the upperpart of the gap y ; but on the contrary, thelower part was moiftend, and not the upperpart. Ire- p- 12&
Text Appearing After Image:
Vegetable Staticks. 129 I repeated this Experiment with a largeDuke-Cherry branch, but could not perceivemore moifture at the upper, than the lowerpart of the gap, which ought to have been,if the fap deicends by the laft years woodor the bark. It was the fame in a Quince-branch asthe Duke Cherry. N. B. When I cut a notch in either ofthefe branches, 3 fcet above r, at q, I couldneither fee nor feel any moifture, notwith-standing there was at the fame time a greatquantity of water palling by : for the branchimbibed at the rate of 4, 3 or 2 inches perminute, of a column of water which washalf inch diameter. The reafon of which drynefs of the notchq is evident from Experiment n, viz,becaufe the upper part of the branch abovethe notch imbibed and perfpired 3 or 4times more water, than a column of 7feet height of water in the tube could im-pell from the bottom of the flem to q,which was 3 feet length of ilem 5 and con-sequently, the notch muft neceffarily bedry, notwithstanding fo large a f

Note About Images