CONTENTS. Vll 



CHEMISTRY. ^"^ 



Professor T. Andrews on a Simple Instrument for graduating Glass Tubes. . 37 



Professor Balfour's Exhibition of British Lichens, containing Dyeing Lichens 37 



ChevaUer Claussen on the Effect of Sulphate of Lime upon Vegetable Sub- 

 stances 38 



Rev. Thomas Exley on the Cause of the Transmission of Electricity along 

 Conductors generally, and particularly as apphed to the Electric Telegraph 

 Wires 38 



Dr. John P. Gassiot on the Decomposition of Water under Pressure, by the 

 Galvanic Battery 39 



Mr. John Hall Gladstone on the Corrosion of Iron-built Ships by Sugar 

 Cargoes 41 



on the Spontaneous Decomposition of Xyloidine 41 



Mr. W. R. Grove on the Conduction of Electricity by Flame and Gases .... 42 



Professor Johnston on the Origin and Composition of the Mineral called 

 Rottenstone 42 



Note on the Formation of Magnesian Limestone 42 



on the Properties and Composition of the Cocoa Leaves 43 



on the Causes, Physical and Chemical, of Diversities of 



Soils 43 



M. Kukla's Description of some new kinds of Galvanic Batteries 44 



Mr. G. Lowe's Note on the Advantages arising from the Purification of Coal- 

 Gas, by the Apphcation of Water in an Instrument called "The Scrubber". . 45 



Mr. T. J. Pearsall on Changes observed in Wood from the Submerged 

 Forest at Wawne in Holdemess 45 



on Crystals from the Sea-coast of Africa 45 



on Lime Flowers, or pecuUarly formed Substances from 



the brickwork of one of the Reservoirs of the Hull Water-works before final 

 completion for use 45 



Dr. AsTLEY P. Price on the Emplojonent of Pentasulphate of Calcium 

 as a Means of preventing and destroying the O'idium Tuckeri, or Grape 

 Disease 46 



on a New Method for determining the Commercial 



Value of Oxide of Manganese 47 



on a New Method for determining the Amount of 



available Chlorine contained in Hypochlorites of Lime, Soda, or Potash .... 48 



Mr. J. D. SoLLiTT on the Chemical Constitution of the Humber Deposits . . 49 



GEOLOGY. 



Dr. J. Blake on the Comparative Richness of Auriferous Quartz extracted at 

 difi^erent Depths from the same Lode 50 



Professor Buckman on the Cornbrash of Gloucestershire and part of Wilts . . 50 



Mr. E. Charlesworth's Notice of the curious Spiral Body in certain Fossil 

 Sponges, and of several other remarkable Fossils from the Yorkshire Strata 51 



