CONTENTS. 



MEMOIRS. page 



On the Decomposition by Shock of Endothermic Compounds. By J. A. 

 Harker, Dalton Chemical Scholar, and H. B. Dixon, F.R.S., 

 Professor of Chemistry in the Owens College ... ... ... ... 12 



Experiments on the Transmission of Explosions across Air Gaps. By 

 Bevan Lean, B.Sc, Dalton Chemical Scholar, and Harold B. 

 Dixon, F.R.S., Professor of Chemistry in the Owens College ... 16 



The 143 Six-letter Functions given by the first transitive maximum groups 

 of six letters, with full exhibition of the Values of the Functions. By 

 the Rev. Thos. P. Kirkman, M.A., F.R.S 2-, 



Notes on Sewage Precipitation. By Harry Grimshaw, F.C.S... .. 55 



On the Permians of the N.W. of England. Discovery of Two Plant 

 Beds in the St. Bees Sandstone, at Hilton, Westmorland. With 

 Plates. By William Brockbank, F.G.S.,F.L.S 66 



On the Interchange of Two Differential Resolvents. By the Rev. Robert 



Harley, M.A., F.R.S. , Corresponding Member ... 79 



Hymenoptera Orientalis ; or Contributions to a knowledge of the Hymen- 

 opteraof the Indian Zoological Region. With Plate. By P. Cameron. 

 Communicated by John Boyd ... ... ... ... ... ... 97 



On Iridescent Colours and a Method of examining Iridescent Objects, 

 Birds, Insects, Minerals, &c, so as to ensure uniformity in their 

 description. By Alex. Hodgkinson, M.B., B.Sc 149 



Notes on some Ancient Dyes. By Edward Schunck, Ph.D., F.R.S.... 158 



On the action of Acetic Acid, with oxidising substances, on Indigo Blue. 

 By Charles O'Neill, F.C.S 162 



PROCEEDINGS. 

 Bailey, Charles, F.L.S. — On the Artificial Colouration of Flowers 



through the roots ... ... 147 



On a Japanese Botanical Text-book on Timber-trees ... ... ... 172 



Brockbank, W., F.L.S., F.G.S. — On the Artificial Colouration of 



Flowers 142 



Corbett, Joseph. — Memorandum on Lifeboats, as to the relative values 



of Stability versus Self-righting Power ... 4 



Dixon, H. B m F.R.S. — On the Explosion of Carbonic Oxide and Oxygen 



with other Gases, with reference to experiments by Professor Bekstoff 147 



