KNUELEY : THE BRITISH ASSOCIATION. 



3^9 



ing particulars respecting museums other than those in London. 

 Considerable assistance had been given by the secretaries of many 

 of the local societies. 



Earth - Tremors Committee. — This is a committee for the 

 purpose of considering the advisability and possibility of establishing 

 in other parts of the country observations upon the prevalence of 

 earth-tremors, similar to those now being made in Durham in con- 

 nection with coal-mine explosions. Prof. Lebour, the secretary, said 

 that the corresponding societies, if they would interest themselves in 

 the matter, might be the means of establishing a great network of 

 seismoscopes with a few seismographs in suitable localities, and 

 results of value would by this means Ije in all probability obtained. 

 A sufficiently good seismoscope might be had for about £^2, a seismo- 

 graph for ^14 to ^15, and the cost of keeping them in order would 

 not be great. He hoped the delegates present would help in 

 establishing such a network of observing stations all over the 

 country, and he would be happy to communicate with anyone 

 interested in the subject. 



Prof. Ewing said that it certainly seemed to him that no bodies 

 could more appropriately undertake that work than the local societies 

 represented at the Conference acting in conjunction with a committee 

 of the Association. From recent observations it appeared probable 

 that tremors would be found wherever they were tested for with 

 sufficient delicacy, so that a society undertaking the search was not 

 likely to be disappointed. 



Temperature Variation in Lakes, Rivers, and Estuaries. — 

 This committee, of which Mr. John Murray is the secretary, is 

 appointed to arrange for an investigation of the seasonal variations 

 of temperature in lakes, rivers, and estuaries in various parts of the 

 United Kingdom, in co-operation with the local societies represented 

 at the Association. 



Dr. H. R. ^Lll proposed that the Societies situated in the neigh- 

 bourhood of rivers and estuaries, which were willing to undertake 

 this work, should appoint some member to observe the temperature 

 daily or weekly, as the case might be, in accordance with the rules 

 to be drawn up by the committee. 



r^Ir. T- W. Davis raised the question whether it would be of use to 

 extend the observations to the streams in manufacturing districts. He 

 also asked what the committee proposed to consider an estuary. 



Dr. Mill, in reply, said that the temperature of streams in manu- 

 facturing districts should certainly be ascertained in as many cases as 

 possible, in order to find whether the increase of temperature of a 

 river passing through a manufacturing town is in any sense permanent. 



Oct. 1888. 



