May 14, 1897.] 



SCIENCE. 



757 



From a note in the current number of the 

 American Journal of Science we take the follow- 

 ing facts regarding the late Matthew Carey Lea, 

 who died on the 15th of March. He was born 

 in 1823, and was the eldest son of Isaac Lea, 

 the publisher, well known as a geologist and a 

 mineralogist, but especially as a conchologist in 

 connection with his investigations on the genus 

 Unio. His early associations giving him a 

 special interest in scientific matters, he entered 

 the laboratory of Professor James C. Booth and 

 there acquired great proficiency in chemistry. 

 To this science he devoted his life, his chemical 

 researches being numerous and important. He 

 was elected to membership in the National 

 Academy of Sciences in 1892, and the list of his 

 more important papers then published con- 

 tained fifty-four titles. These investigations 

 for the most part related to the chemistry of 

 photography, aud especially to the action of 

 light and other forms of energy upon silver 

 salts. He described photo-bromide and photo- 

 iodide of silver, and in 1887 published a paper 

 on the ' Identity of the photo-salts of silver with 

 the material of the latent photographic image.' 

 His most remarkable discovery, made in 1889, 

 was that silver is capable of existing in three 

 allotropic states. 



On the catalogues of Muscineas by Mitten, 

 in Godman's Natural History of the Azores, 

 which recognized 47 species from the archi- 

 pelago, aud the recent collections of Trelease, 

 Brown, Carreiro, Machado, Blanchy, Sichard 

 and Minelle, M. Cardot in the last report of the 

 Missouri Botanical Garden bases a catalogue of 

 88 Azorean species and 14 varieties or forms, of 

 which 9 species and 3 varieties are considered 

 as new to science. He also describes one new 

 species and indicates one other as probably un- 

 described, from a small collection of 19 species 

 made on Madeira last year by Trelease. Eleven 

 plates illustrate, in habit and detail, the novel- 

 ties. 



A LETTER from Professor Th.Tschernychew to 

 Dr. Persifor Frazer in reference to the approach- 

 ing International Geological Congress is trans- 

 lated and published in the current number of 

 the American Naturalist . It states "that from 

 this time on the number of persons who have in- 



scribed themselves is so great — nearly 700 — that 

 it will be absolutely impossible to enable them 

 all to take part in the excursions." It is not 

 clear from this whether those already registered 

 may be excluded from the excursion or whether 

 this applies only to new applicants, but those 

 who are attracted to the Congress by these ex- 

 cursions will do well to make enquiry. 



The issue of Science for February 12th con- 

 tained an article by Professor A. B. Macallum 

 on the arrangements for the Toronto meeting of 

 the British Association. We are now able to 

 give the preliminary daily programme, which is 

 as follows : 



Wednesday, August ISth. Reception Room open, 8 

 a. m. to 6 p. m. ; Meeting of Council at 10 a. m. ; 

 Meeting of General Committee at 3 p. m ; Address 

 of the President, Sir John Evans, in Massey Hall, 

 at 8 p. m. 

 Thursday, August 19th. Sectional Meetings in most 

 cases, 10 a. m. to 3 p. m. ; Garden Party, 3.30 to 6 

 p. m ; Conversazione in the Legislative Buildings, 

 8.30 to 11.30 p. m. 

 Friday, August SOtli. Sectional Meetings in most 

 cases, 11 a. m. to 3 p. m. ; Garden Party, 3.30 to 

 6 p. ra. : Lecture by Professor W. C. Roberts- 

 Austen, C.B., F.R.S., in Massey Hall at 8.30 p. m. 

 Saturday August 21st. Sectional Meetings, 10 a. m. 

 to 1 p. m. ; Excursion of Members of Section G. 

 ( Mechanical Science) to Niagara, 9 a. ni. to 6 p. m. ; 

 Excursions to Hamilton and neighborhood, Niagara 

 Falls aud Muskoka Lake Region, returning on 

 Monday morning. Lecture to Workingmen. Lec- 

 ture and subject to be announced. 

 Monday, August S3d. Sectional Meetings in most 

 cases, 10 a. m. to 4 p. m; Excursion of Members 

 of Section C (Geology) to Scarboro' Heights, 1 to 6 

 p. m.; Garden Parties; Lecture by Professor J. 

 Milne, F.R.S., on Earthquakes, in Massey Hall, at 

 8:30 p. m. 

 Tuesday, August 34th. Sectional Meetings in most 

 cases, 10 a. m. to 3 p. m.; Garden Party at Trin- 

 ity College, 4 to 6 p. m. ; Conversazione in the Uni- 

 versity Building, 8:30 to 11:30 p. m. 

 Wednesday, August SSth. Some Sectional Meetings, 

 10 a. m. to 1 p. m.; Concluding General Meeting, 

 2:30 p.m.; Garden Parties, 3:30 to 6 p.m.; Ban- 

 quet in honor of Lord Kelvin, Lord Lister and Sir 

 John Evans, 8 p. m. 

 Thursday, August 36th. Excursions to Niagara Penin- 

 sula, Thousand Islands, Ottawa, Montreal, Upper 

 Lakes and to Manitoba and British Columbia. (See 

 Excursion Guide. ) 



