5 



quantities occurring in logarithmic formulae, and series expressing 

 circular arcs, are given by the author. By considering all quantity 

 as affirmative per se, and admitting plus and minus merely as cor- 

 relative terms, we thus succeed in banishing mystery and paradox 

 from the science most powerful in eliciting truth, and where they 

 ought least to find a place. 



November 25. 

 DA VIES GILBERT, Esq. President, in the Chair. 



The following Presents were received, and thanks ordered for 

 them : — 



Transactions of the Plymouth Institution. 8vo. — Presented by the 

 Institution. 



Illustrations of Indian Zoology 5 consisting of coloured Plates of 



new, or hitherto un figured, Indian Animals, from the collection 



of Major-general Hardwicke, F.R.S. Selected and arranged by 



John Edward Gray, folio. — John E. Gray, Esq. 

 Monthly Notice of the Proceedings of the Astronomical Society. 



No. 29. 8vo.— The Society. 

 Ireland and its Economy} being the result of Observations made in 



a Tour through the Country in the Autumn of 1829. Bv James 



E. Bicheno, Esq. F.R.S. 8vo.— The Author. 

 The Elements of the Theory of Mechanics. By the Rev. Robert 



Walker, M.A. 8vo.— The Author. 

 The London Literary Gazette. No. 722. 4to. — The Proprietors. 

 An Engraved Portrait of John Dalton, Esq. F.R.S. — Joseph Allen, 



Esq. 



Memoires presentes par divers Savans a l'Academie Royale des 



Sciences de l'lnstitut de France, et imprimis par son ordre. 



(Sciences Mathematiques et Physiques.) Tome deuxieme. 4to. 



1830.— The Academy. 

 Astronomische Beobachtungen auf der Koniglichen Universitats- 



Sternwarte in Konigsberg. 13 u. 14 Abtheilungen. Von F. W. 



Bessel, Ritter, u. s. w. folio. — Professor Bessel, Foreign Memb. R.S. 

 Annalen der K. K. Sternwarte in Wien. Nach dem Befehle Seiner 



Majestat, auf OefFentliche Kosten, herausgegeben. Von J. J. Lit- 



trow und Lambert Mayer. Zehnter Theil. folio. — Professor 



Littrow. 



A Paper was read, entitled, " On a simple electro-chemical 

 method of ascertaining the presence of different metals j applied 

 to detect minute quantities of metallic poisons." By Edmund 

 Davy, Esq. F.R.S., M.R.I. A., and Professor of Chemistry to the 

 Royal Dublin Society. 



The Voltaic arrangement employed by the author consisted 

 merely of small slips of different metals, generally zinc and platina, 

 placed in contact and forming a galvanic circuit with the inter- 



