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On the Refraction of Sound by the Atmosphere. By Prof. Osborne Rey- 

 nolds, Owens College, Manchester 104 



On the Length of the Spark from a Battery of 600, 1200, 1800, and 2400 

 rod-Chloride-of-Silver Cells, and some Phenomena attending the Dis- 

 charge of 5640 Cells. By Warren De La Rue, D.C.L., F.R.S., and Hugo 

 W. Miiller, Ph.D., F.R.S 167 



January 13, 1876. 



On the Optical Deportment of the Atmosphere in reference to the Pheno- 

 mena of Putrefaction and Infection. By John Tyndall, F.R.S 171 



January 20, 1876. 



Certain cases of Electromotive Force sustained by the Action of Electrolytes 

 on Electrolytes. By J. Hopkinson 183 



On Reversed Photographs of the Solar Spectrum beyond the Red, obtained 

 on a Collodion Plate. (In a Letter to Prof. Stokes.) By Captain J. 

 Waterhouse, Assistant Surveyor-General of India 186 



Report of the Meteorological Committee to the President and Council of 

 the Royal Society on the Work done in the Meteorological Office since 

 their appointment in 1866 to December 31, 1875 189 



On the Structure, Physiology, and Development of Antedon ( Comatula, 

 Lamk.) rosaceus. By William B. Carpenter, M.D., F.R.S. (Plates 8, 9.) 211 



January 27, 1876. 



On the Variations of the Daily Mean Horizontal Force of the Earth's Mag- 

 netism produced by the Sun's Rotation and the Moon's Synodical and 

 Tropical Revolutions. By J. A. Broun, F.R.S 231 



Results of the Monthly Observations of Magnetic Dip, Horizontal Force, 

 and Declination made at the Kew Observatory from April 1869 to March 

 1875 inclusive. By the Kew Committee 232 



Contributions to the Minute Anatomy of the Thyroid Gland of the Dog. 

 By E. Cresswell Baber, M.D. Lond 240 



Research on the Minute Anatomy of the Alimentary Canal. By Herbert 

 A. Watney, M. A., Demonstrator of Microscopical Anatomy at St. George's 

 Hospital 241 



List of Presents 244 



No. 167.— February 3, 1876. 



On Formulas of Verification in the Partition of Numbers. By J. W. L. 

 Glaisher, M.A., F.R.S 250 



On the Development and Succession of the Poison-fangs of Snakes. By 

 Charles S. Tomes, M. A 259 



