on resigning office, 27 October, 1890. xxxi 



By Professor Whewell : On the application of mathematical reasoning to cer- 

 tain theories of Political Economy. 



After the meeting Professor Whewell gave an account of various contrivances 

 employed in dipping needles, and of some suggested improvements. 



March 16, 1829. 



By Professor Whewell: On the application of mathematical reasoning, etc. 



(concluded). Trans. III. 191—230. 

 By Rob. Willis, M.A. (Gonv. & Cai.) : On the theory of the sounds of pipes as 



relating to their vowel quality (concluded from 24 Nov. 1828). Trans, in. 



231—268. 

 After the meeting Mr Willis exhibited experiments illustrative of the influence 



of the length of the pipe on the vibrations of the reed, and of the different 



ways in which the vowel sounds may be produced. 



March 30, 1829. 



By Ja. Challis, M.A. (Trin.) : Abstract of a memoir on the vibrations of elastic 



fluids. Trans, in. 269—320. 

 By Joh. Will. Lubbock, M.A. (Trin.) : On the tables of the chances of life, and 



on the value of annuities. Trans, in. 321 — 341. 

 After the meeting Professor Henslow gave an account of the organization and 



classification of ferns, illustrated by drawings. 



May 4, 1829. 



By Professor Whewell : On the mineral ogical systems proposed by Nordenski- 



old, Bernsdorff, Kefersheim, and Naumann. 

 After the meeting Mr Leonard Jenyns gave an account of the construction, 



properties, and mode of growth, of feathers. 



May 18, 1829. 



By Will. Hallows Miller, M.A. (Joh.) : On caustics formed by successive re- 

 flexions at a spherical surface. 



By Rob. Willis, M.A. (Gonv. & Cai.): On the mechanism of the human voice. 

 Trans, iv. 323—352. 



After the meeting Mr Willis exhibited various experiments and models, and 

 explained the action of the organs of voice. 



November 16, 1829. 



By Professor Airy : On a correction of the length of a pendulum consisting of 



a wire and ball. Trans, in. 355 — 360. 

 By Professor Whewell : On the causes and characters of Pointed Architecture. 

 After the meeting Professor Whewell described the kinds of vaulting employed 



in German churches, with their history; illustrating his account with 



models. 



November 30, 1829. 



By Ri. Wellesley Rothman, M.A. (Trin.) : On an observation of a solstice at 



Alexandria recorded by Strabo. Trans, ill. 361 — 363. 

 By Professor Whewell : On Pointed Architecture (concluded). 

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



crystals. Trans, ill. 365—367. 

 After the meeting Professor Sedgwick gave an account of the geology and 



structure of the Alps, illustrated by a section from the plains of Bavaria 



to those of Trieste. 



