384 Ohituarij—Prof. Blake— G. F. Harris— Pe)-cy Emary. 



pressure on the two faces ; and in further elaboration of the theory, 

 he outlines a method of estimating the percentage interference of 

 two contiguous wells in the same strata. 



In the concluding portion of the paper he discusses data collected 

 during various hydrological survey's, and points out the influence of 

 surface configuration and stratigraphical sequence on the sub-surface 

 water contours. 



The next meeting of the Society will be held on Wednesday, 

 November 7th, 1906. 



OBITTJ.A.I^'2'. 



PROFESSOR J. F. BLAKE, M.A., F.G.S. 



With deep regret we have to record the death of this well-known 

 geologist, which occurred on Saturdaj', 7th July, in his 67th year, 

 at 35, Harlesden Gardens, N.W. 



We shall give some account of his life and writings in our 

 September number. 



GEORGE FREDERICK HARRIS, F.G.S. 



We have to announce the loss of another able geologist and 

 contributor to this Journal. Mr. George Frederick Harris, F.G.S., 

 who died on 16th July at his residence, 20, Parchmore Road, 

 Thornton Heath, Surrey, after prolonged illness, was one of the 

 founders of the Malacological Society of London, and served the 

 office of Treasurer for some time ; he also contributed several papers 

 to its Proceedings. He was for nearly 20 years Lecturer on 

 Geology at the Birkbeck College. 



We shall give a fuller account of Mr. Harris's life and work in 

 the September number. 



PERCY EMARY, F.G.S., 



Honorary Secretary of the Geologists' Association, Assistant Lecturer on Geology to 

 the Birkbeck College. 



The unexpected death of this young and most energetic geologist, 

 who for nine years filled the office of Secretary to the Geologists' 

 Association, took place on May 25th, after only a month's illness, at 

 20, Turle Eoad, Tollington Park, N. 



His work for the Geologists' Association was of the greatest 

 value, and by his early decease he leaves a widow but very 

 inadequately provided for. In recognition of his services to science, 

 a Fund, to be called " The Percy Emary Fund," is being raised by 

 geologists and others for Mrs. Emary's benefit ; and Mrs. R. S. 

 Herries, 24, Gloucester Street, Belgrave Road, S.W. (wife of the 

 President of the Geologists' Association), has consented to act as 

 Treasurer and receive subscriptions. Miss Mary C Foley (51, Elm 

 Park Mansions, Park Walk, Chelsea, S.W,) is acting as Secretary. 

 Cheques and postal orders should be made payable to " The Percy 

 Emary Fund," and crossed " Lloyds' Bank, Belgrave Road Branch." 



