24G Annals of Natural History, 8fc. 



Botanical Excursions in the neighbourhood of Trieste, by 

 Edward Forbes, M.W.S. On the habits of Apterix Aus- 

 tralis, by the late Allen Cunningham, Esq. Characters of 

 four new Cape Orchidaceas, by Prof. Lindley. On the oc- 

 currence of Squalus spinosus, Lin. on the coast of York- 

 shire, by Arthur Strickland, Esq. Remarks by Sir W. 

 Jardine, Bart, on the Habits of the Crotophaga continued. 

 Continuation of information respecting Botanical, Travellers, 

 with several interesting bibliographical notices, from which 

 we make a few extracts, as well as from the Proceedings 

 of the Zoological Society for March, 1839, in which we find 

 several Indian species of Insects described in a paper by the 

 Rev. F. W. Hope. 



The Edinburgh New Philosophical Journal. Conducted by 

 Professor Jameson, No. 55, October 1839, January 1840. 



The January number of the Edinburgh Philosophical 

 Journal contains the Researches of Professor Reich on 

 the electrical currents in metalliferous veins, first discovered 

 by Fox in the copper veins of Cornwall, and published in 

 the Philosophical Transactions 1830, ii. p. 339. A fresh 

 surface being formed on the opposite points to be connected, 

 and on each of these a copper disc was kept firmly pressed 

 by means of a strut, when the naked end of a copper 

 wire spun over with silk was kept pressed on the copper 

 plate by means of a clamp. Near the points of contact 

 between the two wires Schweigger's multiplicator, with a 

 very sensible double needle, was placed. The following 

 are the results deduced from forty-eight experiments. 



I. Two ore-points separated by a non-metalliferous 

 mass, or between which occurs a cross vein, or the vein is 

 worked out, give rise to an electric current in a metallic 

 wire connecting them. 



II. Two ore-points in uninterrupted metallic connection 

 with one another, induce no electrical current through a 

 wire connecting them. 



