Mil CONTENTS. 



Page 



Hydrostatics. 



Mr. L. Oertling on the Hydrometer and its Adaptation to the present re- 

 quirements of the Board of Inland Revenue 21 



Instruments. 



Mr. S. B. Howlett on a Self-recording Anemometer 21 



Captain Lendy on the Topograph, a new Surveying Instrument 21 



Mr. Cornelius Varley on an Instrument by which any Rainbow that can 

 possibly appear within the area of any picture, may be indicated in its right 

 place and of the true size 22 



CHEMISTET. 



Address by Professor W. A. Miller, M.D., LL.D., Treas. & V.P.R.S.,P.C.S., 

 President of the Section 22 



Mr. F. A. Abel's Notes on Compounds of Copper and Phosphorus 27 



Mr. H. Bird's observations on the Utilization of Sewage, as conducted at 

 Stroud, and on the Growth of the Sewage Plant 28 



Mr. J. C. Bowring on the Preservation of the Sheathing of Ships, and Ex- 

 traction of Silver from Sea-Water by means of Electricity 28 



on the Direction of the Electric Current 28 



Dr. Crace-Calvert on the Action of Acids on Metals and Alloys 28 



Mr. T. Fairley on the Reactions of Cyanogen. Note on Glycocine, with 

 Tables 29 



Mr. Frederick George Finch on the Utilization of Blast-Fumace Slag . . 29 



Mr. David Forbes on some Minerals from South America 29 



on the Colour of Gold as seen by transmitted Light .... 30 



Dr. Frankland on the Constitution of the Acids of the Acetic, Lactic, and 

 Acrylic Series 30 



Dr. Hill on the Sanitary and Economical Aspect of the Sewage Question . . 31 



Dr. Stevenson Macadam on the Results of Agricultural Experiments made 

 in 1864 -. ; 31 



on Esparto Fibre, or Spanish Grass, and its Em- 

 ployment in the Manufacture of Paper 33 



Professor Maskelyne on Crystals of Melaconite, and on Tenorite 33 



Dr. Phipson, a few words on Sponges as a Source of Bromine and of Nitrogen 34 



on the Sublimed Oligist of Vesuvius, and its Artificial Produc- 

 tion 34 



on Silicium in Iron 34 



Dr. D. S. Pbice on the Action of Light upon Sulphide of Lead, and its bear- 

 ing upon the Preservation of Paintings in Picture Galleries 34 



Mr. Manning Prentice on the Progress of the Manufacture of Gun-Cotton, 

 and its Application to Mining, Military, and Sporting Purposes 34 



Mr. Owen Rowland on the Properties of Parkesine, and its application to 

 the Arts, Manufactures, and Telegraphy 34 



Mr. Wentworth L. Scott on the Action of the Alkali Metals in determin- 

 ing the Explosion of Gun-Cotton 35 



Dr. Angus Smith on a Method of estimating Carbonic Acid in the Air .... 35 



