154 KtTMERICAL TABLE OF ELECTIVE ATTRACTIONS. 



spired, they could not give out oxigen. However, thouglr 

 the appearance of perspiration has invariably proved either 

 a cryptogamian plant; the bubbles which hold the per- 

 fumed liquor of leaves, and which are to be found in all 

 leaves that are scented; the eggs of insects; the edges of 

 A trifling per- the pores, &c. ; I do not deny, that there may be a very 

 «puation. trifling degree of insensible perspiration: for I think that 



sort of scurf, or jelly, found on the leaves, arises from it; 

 but this is trifling, and scarcely worth mentioning. 

 The vine per- Of the innumerable quantity of plants I have examined, 

 spires from its f}, ere [ s b ut onCj that in my opinion really does perspire ; 

 and that not on the leaf, but the stalk. This is the vine. 

 When the vine is extremely full of juice, a bubble appears 

 on the stalk, which, magnified, is not a plant; but really 

 issues from the vine as the proper juice of it, for I can 

 see no stalk. With the same truth I should have mentioned it, 

 if I had found hundreds; for to attain truth is my aim, and 

 I am really attached to no system whatever. Mine are 

 merely desultory discoveries, not mine indeed, but those of 

 the solar microscope, to which I transfer all the honour, 

 if there is any. As to the sickness of a plant, any person 

 may perceive, when a plant has been gathered an hour or 

 two, how damp and moist it grows; it is the same when 

 placed under a glass, it droops and grows clammy. 



I am, Sir, 

 Your obliged Servant, 



AGNES IBBETSONT. 

 Belleveu 1§th June. 



IV. 



A numerical Table of elective Attractions ; with Remark* 

 on the Sequences of double Decompositions. By Thomas 

 Youxg, M.D. For. Sec. R.S.* 



numerical tobies ATTEMPTS have been made, by several chemists, to 

 •f elective at- obtain a series of numbers, capable of representing the mu- 

 tractions. 



* Philos. Trans, for 1809, Part I, p. 148. F r a Memoria 



Technica of the double elective attractions, communicated by the 



learned author, see Journal, Vol. XXil, p. 304. 



tuaj 



