vi CONTENTS, 



ARTICLE ^'^^tJK 



. XVI. — Note on the Organs of Fructification and Foliage of Cala- 

 modendron commune (?). By E. W Binney, F.R.S., 



F.a.S 218 



XVII. —On ^he Permian Strata of East Cheshire. By E. W. Binney, 



F.E.S., F.G.S., &c 224 



XVIII. — On the Organic Matter of Human Breath in Health and 



Disease. By Arthur Ransome, M.D., M.A., M.R.C.S.... 234 

 XIX. — On a New Form of Calamitean Strobilus from the Lancashire 



Coal-measures. By Professor W. C. Williamson, F.R.S. 248 

 XX. — A Search for Solid Bodies in the Atmosphere. By R. Angus 



Smith, Ph.D., F.R.S., &c 266 



XXI. — Microscopical Examination of the Solid Particles collected 

 by Dr. Angus Smith from the Air of Manchester. By 



J. B. Dancer, F.R.A.S 270 



XXII.— On the Mean Monthly Temperature at Old Traflford, Man- 

 chester, 1 861 to 1868, and also the Mean for the Twenty 

 Years 1 849 to 1868. By G. V. Vernon, F.R.A.S., F.M.S. 274 

 XXIII.— On the Suspension of a Ball by a Jet of Water. By Pro- 

 fessor Osborne Reynolds, M.A 279 



XXIV.— On the Composition of the Water of the Irish Sea. By T. E. 



Thorpe, Ph.D., and E.H.Morton 287 



XXV. — On the Influence of Changes in the Character of the Seasons 

 upon the Rate of Mortality. By Joseph Baxendell, 



F.R.A.S 303 



XXVI. — Notes of the Rarer Mosses of Perthshire and Braemar. By 



George E. Hunt, Esq 314 



XXVII.— Brief Notes on the Laws of Physical Force. By J. C. Dyer, 



Esq., V.P 32^ 



XXVIII. — On a General System of Numerically Definite Reasoning. 



By Professor W. Stanley Jevons, M.A 330 



