TABLE OF CONTENTS. 



NUMBER VII.— JULY. 



Pago 



Mr. De la Beche's Collections in Foreign Geology. — [No. 1.] 

 ( continued) 1 



M. Poisson, Observations relatives a un Article de Mr. Ivory, 

 inscre dans le No. 5. du Philosophical Magazine, &c. N. S. 

 pour Mai 1827 11 



Mr. Ivory's Letter to Professor Airy, in Reply to his Remarks 

 on some Passages in a Paper by Mr. Ivory 16 



Mr. Graham's Exceptions to the Law that Salts are more solu- 

 ble in iiot than in cold Water ; with a new Instance 20 



Mr. Davies's Symmetrical Properties of Plane Triangles 26 



Mr. Squire on the Semi-arcs of Vibration of a Clock with a 

 Dead Beat Scapement and Deal Pendulum 34< 



D — t on Mechanical Science 38 



Messrs. Steininu;er and NcEggerath's further Account of the 

 great Mass of Native Iron of Bitburg: with Dr. Chladni's 

 Observations ^l 



Dr. Noeggerath on Meteoric Iron from Mexico. In a Letter 

 to Dr. Chladni 46 



Mr. Galbraith on the Method of the Least Squares, as em- 

 ployed in determining the Figure of the Earth, from Experi- 

 ments with the Pendulum, as well as by the Measurements 

 of Arcs 48 



Mr.Gray's Synopsis of the Genera of Saurian Reptiles, in which 

 some new Genera are indicated, and the others reviewed by 

 actual Examination 54 



Mr. Faraday's Corrections in a Work entitled " Chemical Ma- 

 nipulation" 58 



New Books: — Faraday's " Chemical Manipulation" 58 



Proceedings of the Royal Society 66 



Royal Institution of Great Britain 67 



Fluor Spar and Anhydrous Sulphuric Acid — Rheine, a pecu- 

 liar Substance in Rliubarb 68 



Zantiiopicrite, a new Vegetable Colouring Principle — Althein, 

 a peculiar Substance in Marshmallow 69 



Meteorite which fell near Ferrara in 1824 — Composition of 

 Iron. scales 70 



Quantity of Silver and Gold raised in Guanaxuato — Native 

 Iron found in Canaan (Conn. U. S.) 71 



Discovery of Fossil llya?nas in Kent 73 



Mr. Bevanon Register Rain-gauges 74 



Mr. Squire's Comparative Observations of the Solar Eclipse 

 of November '^9, 1 826 76 



New Patents — Meteorological Observations 77 



Meteor- 



