Experimental Researches in Electricity. 361 



cury) which, insulating a voltaic current when solid, and con- 

 ducting it when fluid, is not decomposed in the latter case. 



" There is no strict electrical distinction of conduction 

 which can, as yet, be drawn between bodies supposed to be 

 elementary, and those known to be compounds." 



We have now approached the point to which these prelimi- 

 nary researches were subservient, and our next article will 

 be devoted to the development of Faraday's electro-chemi- 

 cal theory — a theory not more remarkable for its compre- 

 hensiveness, than for its entire consistency of detail, and not 

 more happy in its explanation of established phenomena, 

 than successful in its predictions of the results of combina- 

 tions formed in accordance with its principles. 



May I«, 1842. 



Remarks on a few Plants from Central India. — By W. 

 Griffith. Esq., F.L.S., Imp. Acad. Nat. Cur. 



The accompanying is a partial account of a few plants, 

 kindly presented to me by my friend, Mr. D. Macleod, 

 Principal Assistant to the Commissioner, Jubbulpore. Al- 

 though their number is very limited, yet as they come from 

 the " terra incognita" of Central India, and as one un- 

 described genus is, I think, found among them, I am in 

 hopes that the account may not be altogether devoid of 

 interest, more particularly as the notes appended to the spe- 

 cimens by Mr. Macleod, are practical and interesting. 



1. — Curcuma. Natural family, Scitaminece, the speci- 

 men is without leaves ; its native name is Bun-huldee. 



2. — Cedrela. Natural family, Cedrelacece, so closely re- 

 sembling C. Toona, the Toon of India, that I am unwilling 

 to attempt to characterise it as distinct : although Mr. 

 Macleod says, " this is a tree which I have only met with 

 in a single small Pergunnah, and there in abundance ; it is 

 called by the natives here the Maha-Nim. It closely resem- 



