vii 



Page 



On the Fossil Mammals of Australia.— Part III. Diprotodon australis, Owen. 

 By Professor Owen, F.R.S. &c 196 



February 10, 1870. 



On some remarkable Spectra of Compounds of Zirconia and the Oxides of 

 Uranium. By H. C. Sorby, F.R.S 197 



On the Mathematical Theory of Stream-lines, especially those with four 

 Foci and upwards. Bv William John Macquorn Rankine, C.E., LL.D., 

 F.R.SS. Lond. and Edinb., &c 207 



On Linear Differential Equations.— No. II. By W. H. L. Russell, F.R.S. . 210 



February 17, 1870. 



On a distinct form of Transient Hemiopsia. By Hubert Airy, M. A., M.D. . 212 



Account of the Great Melbourne Telescope from April 1868 to its com- 

 mencement of operations in Australia in 1869. By Albert Le Sueur 216 



February 24, 1870. 



Note on certain Lichens. By John Stenhouse, LL.D., F.R.S., &c 222 



On the successiye Action of Sodium and Iodide of Ethyl upon Acetic Ether. 

 By E. Frankland, F.R.S., and B. F. Duppa, F.R.S 228 



March 3, 1870. 



Results of the Monthly Obseryations of Dip and Horizontal Force made at 

 the Kew Observatory, from April 1863 to March 1869 inclusive. By 

 Balfour Stewart, F.R.S., Superintendent of the Observatory 231 



Spectroscopic Observations of the Nebula of Orion, and of Jupiter, made 

 with the Great Melbourne Telescope. By Albert Le Sueur 242 



On the Nebulae of Argo and Orion, and on the Spectrum of Jupiter. By 

 Albert Le Sueur 245 



List of Presents 251 



No. 118.— March 10, 1870. 



On some Elementary Principles in Animal Mechanics. — No. in. On the 

 Muscular Forces employed in Parturition. By the Rev. Samuel Haughton, 

 M.D., FeUow of Trinity College, Dublin. . . . 257 



Tables of the Numerical Values of the Sine-integral, Cosine-integral, and 

 Exponential Integral. By J. W. L. Glaisher, Trinity College, Cambridge. 262 



Researches on Solar Physics. — No. II. The Positions and Areas of the Spots 

 observed at Kew during the years 1864-66, also the Spotted Area of the 

 Sun's visible disk from the commencement of 1832 up to May 1868. By 

 Warren De La Rue, Esq., Ph.D., F.R.S., F.R.A.S., Balfour Stewart, Esq., 

 LL.D., F.R.S., F.R.A.S., Superintendent of the Kew Observatory, and 

 Benjamin Loewy, F.R.A.S 263 



On the Contact of Conies with Surfaces. By William Spottiswoode, M.A., 

 F.R.S . 264 



