1 6 Proceedings. 



experiments by Mr. Thomas, of Jesus Lane, Cambridge, the 

 plan of insulation with asbestos being that described by 

 Mr. Griffiths in a communication to the Royal Society, 

 read June 19th, 1890. For lower temperature thermometers 

 Mr. Griffiths has recently used anthracene as the insulating 

 material. (See Reports of Section A of the British Associa- 

 tion at Leeds?) Mr. Gee has made with them a number of 

 determinations of melting points and of the resistance of 

 fused salts at different temperatures. Mr. Brockbank 

 remarked that a thermometer to be trusted in measuring 

 the temperature of a blast furnace was much needed. 



Dr. SCHUNCK called attention to the new compound of 

 nitrogen, which seems to act as an acid, instead of being a 

 base or neutral. Dr. SCHUNCK also remarked on the new 

 method of making indigo, which he described as compara- 

 tively simple, and one that seemed likely to lead to 

 important results. Dr. BOTTOMLEY and Mr. FRANCIS 

 Jones took part in the discussion. 



Mr.GwYTHER called attention to the discovery in Canada 

 of a large deposit of nickel, and pointed out the value of 

 such a deposit, if it could, by lowering the price and in- 

 creasing the amount, be brought into general commercial 

 use. Mr. FARADAY inquired, with special reference to the 

 gold and silver monetary controversy, whether chemists or 

 physicists regarded any change in the order of rarity of 

 the metals, or in their approximate quantitative proportions 

 in nature, as at all probable ? 



