306 Annual Report of tJie Council. 



February 4th, 1890. 



On a Spectrum observed in the Blackpool Aquarium. By Alexander 

 Hodgkinson, M.B., B.Sc. 



On the recent abundance of Jack-snipes. By Francis Nicholson, F.Z.S. 



On M. Gustave-Adolphe Him. By R. W. Gwyther, M.A. 



February 18th, 1890. 



On Dr. H. C. Buys Ballot. By Arthur Schuster. Ph.D., F.R.S. 



March 4th, 1890. 



On specimens of Triassic Sandstone from the North of Spain. By W. 

 Semmons. Communicated by C. A. Burghardt, Ph.D., F.C.S. 



On some applications of Caustic Soda or Potash and Carbon in the 

 qualitative and quantitative analysis of minerals. By Charles A. 

 Burghardt, Ph.D., F.C.S. 



March 18th, 1890. 



On an Improved Form of Gauge for Measuring the Thickness of Metal 

 Sheets, Rods, and other Substances from three-fourths to one ten- 

 thousandth part of an inch. By W. H. Johnson, B.Sc. 



On Absorption Spectra and a method for their more Accurate Determi- 

 nation. By Alexander Hodgkinson, M.B., B.Sc. 



April 1st, 1890. 



On Diamonds and Double Refraction. By Alexander Hodgkinson, M.B., 

 B.Sc. 



On Meteorology at the Sea-side : English Channel. By Dr. W. G. Black, 

 F.R.Met.S. Communicated by R. F. Gwyther, M.A. 



April 15th, 1890. 



On Thomas Augustine Arne as an inventor of musical form. By 

 Chas. J. Hall, D.Mus. Lond. 



April 29th, 1890. 



Hymenoptera Orientalis, or contributions to a knowledge of the 

 Hymenoptera of the Indian Zoological Region. Part II. by P. 

 Cameron. Communicated by John Boyd. 



The Levenshulme Limestones. By William Brockbank, F.L.S., F.G.S. 



Description of a New Reflecting Telescope and Observatory at Bowdon, 



Cheshire. By Samuel Okell, F.R.A.S. 

 On the Flexure of a Flat Elastic Spring. By Horace Lamb, M.A., F.R.S. 



