Makch 2, 1000.] 



SCIENCE. 



357 



Color Photography by Means of Diffraction 

 Gratings,' which he has described in this 

 Journal. This lecture was announced for 

 February 14th. Professor Wood was invited 

 while in London to lecture before the Royal 

 Society on February 15th, his subject being 

 ' Photographs of Sound Waves and the Kine- 

 matographic Demonstration of the Evolution 

 of Reflected Wave Fronts,' and before the 

 Physical Society on February 23d, on these and 

 several of his other recent discoveries in physics. 

 He has also been invited to lecture before the 

 Royal Photographic Society and the Camera 

 Club. 



We learn from the Botanical Gazette that Dr. 

 Douglass A. Campbell, professor of botany, in 

 Leland Stanford University, has been spending 

 some time in the University of Berlin and is at 

 present in Egypt. 



The Prussian Ministry of State has expelled 

 Dr. Arons, decent in physics at the University 

 of Berlin. It will be remembered that charges 

 were brought against Dr. Arons for advocat- 

 ing the doctrines of social democratic party 

 and that the University Senate refused to dis- 

 cipline him. 



We regret to record the death of President 

 James H. Smart of Purdue University, Lafay- 

 ette, Ind. 



The death is announced of Professor Charles 

 Piazzi Smyth, the astronomer. He was the son 

 of Admiral William Henry Smyth, a well known 

 hydrographer and astronomer, and was born at 

 Naples in 1819. He began his astronomical 

 work at the Cape of Good Hope in 1835 and 

 was appointed Astronomer Royal of Scotland 

 and Director of the University of Edinburgh in 

 1885. He is best known to the general public 

 for his publications on the ' Great Pyramid. ' 



The death is also announced of Mr. Leander 

 J. McCormick who founded the observatory at 

 the University of Virginia which bears his 

 name. 



The Royal Institution, London, has received 

 for the promotion of experimental research at 

 low temperatures, £100 from Sir Andrew Noble. 

 The Institution has also received £100 from 

 Mr. Charles Hawksley, and £25 from Mr. Frank 

 McClean. 



Ex-Rbpeesentative Isaac Stephenson of 

 Marinette, Wis., has announced his intention 

 to give to that city a public library building, to 

 cost $50,000. 



On the evening of February 21st, the Trustees 

 of the Corcoran Gallery of Art, at Washington, 



D. C, gave a reception to the Washington 

 Academy of Sciences and their guests, the 

 American Institute of Mining Engineers. The 

 spacious halls of the gallery were thrown open 

 and a considerable assemblage was present not- 

 withstanding a very stormy evening. 



The following delegates representing scien- 

 tific organizations, have been assigned from the 

 District of Columbia to attend the Pure Food 

 and Drug Congress : District of Columbia Chem- 

 ical Society : Professor W. H. Seaman, W. H. 

 Krug, Professor Charles L. Reese, W. E. Pat- 

 rick, J. K. Haywood, A. L. Brown ; Department 

 of Agriculture : Secretary James Wilson, Dr. D. 



E. Salmon, Dr. H. W. Wiley, William Saunders, 

 Mr. W. N. Irvin, J. H. Brigham, Dr. W. D. 

 Bigelow ; Army Medical Department : Lieut. -Col. 

 Charles Smart, Dr. William M. Mew ; Navy 

 Medical Department : Medical Director, Charles 

 H. White ; Health Department District of Co- 

 lumbia : Dr. Wm. C. Woodward, Professor J. 

 D. Hird, Mr. H. C. McLean, Dr. W. C. Fowler; 

 American Pomological Society: Professor Wm. 

 A. Taylor ; Commissioners of Pharmacy : Dr. 

 John T. Winter, Dr. W. P. Carr, G. G. C. 

 Simms ; Pharmaceutical Association : W. G. 

 Duckett, H. A. Johnston, R. M. Harper ; Col- 

 lege of Pharmacy : W. S. Thompson, F. M. Cris- 

 well, S. T. Hilton. 



The preliminary announcement has been 

 issued for an International Congress of General 

 Botany to be held at Paris from the 1st to the 

 loth of October of the present year. The of- 

 ficial language of the Congress will be French, 

 but papers in other languages will be accepted 

 if they are accompanied by a brief abstract in 

 French. Abstracts must be received not later 

 than September 16th. The president of Con- 

 gress is M. Prillieux, and the secretary, M. Per- 

 rot, Ecole Superienre de Pharmacie, Paris. 



An International Congress of Navigation 

 will be held at Paris from July 28th to August 

 3d. It will include in its scope not only navi- 



