Uniform Temperature from Loch Katrine. 13 



be necessary, so that the water, instead of flowing directly from the 

 tunnel into the reservoir, might be conveyed by pipes along the bottom, 

 upon the same level as, and to within a short distance of, the exit 

 pipes for supplying the city, so that the water might pass directly 

 through from the tunnel into the distribution pipes, and thus secure a 

 constant supply of fresh cool water to the inhabitants. This could not 

 be the case, if allowed to flow direct from the mouth of the tunnel, and 

 mingle with the mass of water in the reservoir. 



Having submitted these suggestions to the Water Commissioners, 

 they were, by them, communicated to Mr. Bateman, and I am happy 

 to think that they have so far met his approval, as, in a communication 

 I had from him, he states that he has made provision for carrying the 

 water in pipes from the timnel, along the bottom of the reservoir, to 

 the exit pipes. 



January 23, 1856. — The Peesident in the Chair. 



The following gentlemen were elected members : — Mr. George Innes, 

 Bombay Army, Edinbarnet, near Glasgow; Mr. George Thomson, 

 Engineer, Clydebank Foundry; Mr. Robert M'Connel, Founder, 18 

 Benfield Street; Mr. Wm. G. Wilson, Engineer, 49 West George 

 Street. 



Professor William Thomson read papers " On the Effects of Mechani- 

 cal Strain on the Electric Conductivity of Metals." 



" On the Effect of Magnetization on the Electric Conductivity of 

 Iron." 



February 6, 1856. — The Peesibent in the Chair. 

 Dr. Anderson described the Manufacture of Aluminium. 

 Mr. J. Finlay read a paper " On the Practice and Difficulties of 

 Ventilation." 



February 20, 1856. — The Peesident in the Chair. 



Dr. Alexander M'Fie Smith, Govan, and Mr. Walter M'Lellan were 

 elected members. 



The President read a paper " On the Different Forms of the Gills, or 

 Branchial Apparatus, in Vertebrate Animals ;" and exhibited specimens 

 of Fujtal Skates and Sharks, together with the Menobranchus, Siredon, 

 and other Animals. 



Professor W. J. Macquorn Rankine exhibited a collection of full- 

 sized drawings of the fractures of railway axles. 



