394 . NATURAL SCIENCE. May. 1894. 



of 1 87 1 he has organised the Newberry Library in that city. Dr. 

 Poole was President of the American Library Association for several 

 years. His great work, " An Index to Periodical Literature," laid a 

 debt upon readers difficult to estimate, and it is unquestionably one 

 of the greatest bibliographic labours of any time. 



Mr. Henry Bean Mackeson, who died at Hythe in March last, 

 was in his eighty-third year. He was well known as an archaeologist 

 and geologist, and was the one to discover the great Saurian in 

 the lower greensand of Hythe, which was described by Owen as 

 Dinodocus mackesoni. 



We also regret to record the death of John Bickerton Morgan, 

 of Welshpool, one of the most promising geologists of the younger 

 school. Mr. Morgan died of phthisis in March. 



Among others who have passed away we notice the name of 

 George Pygroft, of Richmond, Surrey, whose death occurred 

 at Torquay on Good Friday. Mr. Pycroft was one of the original 

 founders of the Devonshire Association for the advancement of 

 science and art, his chief interests being centred in archaeology and 

 art. Mrs. Mary Hemenway, the Boston millionaire, who employed 

 throughout life her knowledge, experience, and great wealth in 

 inaugurating and fostering all matters relating to social and edu- 

 cational progress, scientific and historical research. She is best 

 known as a friend to American archaeology, and promoted and carried 

 through the " Hemenway Exploring Expedition " in Arizona. Dr. 

 F. Ulrich, Professor of Zoology in Hanover Polytechnic ; Dr. 

 S. A. Weiss, the well-known Professor of Botany at Prague ; and 

 Dr. Arthur Hill Hassall, the microscopist and analyst, who died 

 on April 9 at his home at San Remo ; also swell the heavy list which 

 we regret to have to record this month. 



