TIU CONTENTS. 



Page 

 Dr. J. D. EvKHETT on the Results of Observations of Atmospheric Electricity 



at Kew Observatory and at Windsor, Nova Scotia 20 



Mr. Geoege Forbes on the Meteor Shower of August 1867 20 



Mr. Chaeles Meldeum on the Gales and Hun-icanes of the Indian Ocean 



South of the Equator 21 



Mr. E. W. Moffat on Meteorological Observations at Sea 25 



Mr. Baxfoub Stewart on the Errors of Aneroids at various Pressures .... 26 



Colonel Sykes on Storm-Warnings, their Importance and Practicability .... 27 



Mr. John Thruston on Evaporation from Rain-gauges 28 



CHEMISTET. 



Address by Thomas Anderson, M.D., F.R.S.E., President of the Section . . 28 



Mr. G. Ansell on an Apparatus for indicating the Pressure and Amount of 

 Firedamp in Mines 31 



Mr. I. LowTHiAN Bell on a Method of Recovering Sulphur and Oxide of 

 Manganese used at Dieuze, near Nancy, France 31 



Dr. A. Crum Brown's Remarks on the Calculus of Chemical Operations .... 31 



Mr. DtiGALD Campbell's Note on Messrs. Wanklyn, Chapman, and Smith's 

 method of determining Nitrogenous Organic Matters in Water 32 



Mr. A. R. Catton on the Synthesis of Formic Acid 32 



on Loewig's Researches on the Action of Sodium Amalgam 



on Oxalic Ether 32 



Mr. W. Crookes on a New Polarizing Photometer 32 



Mr. A. E. Fletcher on a Self-Registering Per^ietual Aspirator 32 



on an Ether Anemometer for Measuring the Speed of 



Air in Flues and Chimneys 33 



Dr. Gladstone on the Refraction Equivalents of Salts in Solution 34 



Dr. N. DE Khanikof's Experiments for the Verification of the laws of Dr. 

 Henry and Dalton on the Absorption of Gases by Liquids 34 



Mr. J. B. Lawks and Dr. J. H. Gilbert's Preliminary Notice of Results on 

 the Composition of Wheat grovrn for twenty years in succession on the 

 same Land 36 



Dr. George I^awson's Notes of the Analyses of Gold Coins of Columbia, 

 New Granada, Chili, and Bolivia; with some account of the operations of 

 Gold Mining in Nova Scotia 37 



Dr. W. Lauder Lindsay on the present Uses of Lichens as Dye-stuffs .... 38 



Messrs. P. T. Main and A. R. Catton on a New Synthesis of Ammonia. ... 40 



Mr. W. L. Scott's Note on the Artificial Production of Oil of Cinnamon . . 40 



on the Bisulphite of Calcium as a Preservative of Animal 



Substances , 40 



Drs. Maxwell Simpson and A. Gautier on a Compound formed by the 

 direct union of Aldehyde and Anhydrous Prussic Acid 40 



Dr. Maxwell Simpson on the Formation of Succinic Acid from Chloride of 

 Ethylidene 42 



Mr. R. F. Smith on the Gaseous Products of the destructive distillation of 

 Hydrocarbons, obtained from Shales and Coals at Low and High Tem- 

 peratures 43 



