xxxii Address of Mr J. W. Clark, President, 



December 14, 1829. 



By Professor Airy: On the mathematical conditions of continued motion. 



Trans. III. 369—372. 

 By Ch. Pleydell Neale Wilton, M.A. (Joh.) : On the geology of the shore of 



the Severn in the Parish of Awre in Gloucestershire. 

 After the meeting Mr Leonard Jenyns gave an account of the circumstances 



connected with the migration of Birds. 



February 22, 1830. 



By Ja. Challis, M.A. (Trin.) : On the integration of the equations of motion of 



fluids ; and on the application of this to the solution of various problems. 



Trans, in. 383—416. 

 By Leonard Jenyns, MA. (Joh.) : On the Natter-Jack of Pennant, with a list 



of Reptiles found in Cambridgeshire. Trans, in. 373—381. 

 After the meeting Professor Henslow explained the discoveries of M. Dutro- 



chet on Endosmose and Exosmose. 



March 8, 1830. 



By Ch. Pleydell Neale Wilton, M.A. (Joh.): Account of a visit to Mount 



Wingen, the burning mountain of Australia. 

 By Hen. Coddington, M.A. (Trin.) : On the construction of a microscope 



invented by him, which he exhibited to the Society. 

 After the meeting Professor Airy gave an account, illustrated by models, of 



the instruments which have been used to measure altitudes : viz. the 



Zenith Sector, the Quadrant, the Refracting Circle, the large Declination 



Circles of Troughton, and the Circles of Reichenbach. 



March 22, 1830. 



By Will. Hallows Miller, M.A. (Joh.): On the measurement of the angles of 

 certain crystals which occur in the slags of furnaces. Trans, in. 417 — 420. 



By Hen. Coddington, M.A. (Trin.) : On the advantages of a microscope of a 

 new construction. Trans, in. 421 — 428. 



By Hugh Ker Cantrien, B.A. (Trin.'i : On the Calculus of Variations. 



Mr Willis gave an account, illustrated by models and drawings, of the con- 

 struction and muscles of the tongue, palate, and pharynx, and of the 

 mode in which these operate in the production of vowel and modulated 

 sounds. 



April 26, 1830. 



By Leon. Jenyns, M.A. (Joh.) : On the late severe winter. 



By Hen. Coddington, M.A. (Trin.) : On his new-invented microscope. 



By Professor Whewell : On the proof of the first law of motion. 



After the meeting Professor Whewell gave an account of Gothe's objections to 



the Newtonian theoiy of Optics, and of the doctrine proposed by that 



author. 



May 10, 1830. 



By Tho. Chevallier, M.D. : On the anatomy and physiology of the ear. 



After the meeting Professor Gumming explained the construction and use of 

 the areometer of Professor Leslie, and its resemblance to the stereometer 

 of Captain Say ; and the construction of an instrument for measuring the 

 whole quantity of sunshine which operates during any given time. 



