882 



SCIENCE. 



[N. S. Vol. IX. No. 234. 



phur, four hundred pounds to the acre ; gather 

 and burn all diseased roots at the time the crop 

 is harvested ; destroy all related weeds, avoid 

 bruising the tubers ; store in dry places at a 

 temperature of about 70° ; remove and burn 

 diseased tubers as soon as they begin to decay. 

 Surely the grower of the sweet potato naust be 

 alert to bring his crop to a successful issue. 

 Charles B. Bessey. 

 Univeebity of Nebraska. 



THE AMERICAN ASSOCIATION FOB THE AD- 

 VANCEMENT OF SCIENCE. 



The preliminary announcement of the forty- 

 eighth meeting of the American Association for 

 the Advancement of Science has been issued by 

 the local committee. It will be remembered 

 that the meeting will be held at Columbus, 

 Ohio, from the 21st to the 26th of August, un- 

 der the presidency of Professor Edward Orton. 

 The first general session will as usual be held 

 on Monday morning, when the President elect 

 will be introduced by the retiring President, 

 Professor F. W. Putnam, and addresses of wel- 

 come will be made by the Govei'nor of Ohio and 

 the Mayor of Columbus. The addresses of the 

 Vice-Presidents will be given on Monday after- 

 noon, and the address of the retiring President 

 In the evening. The several sections will meet 

 as usual during the week, and Saturday will be 

 devoted to an excursion, probably to the 

 mounds at Fort Ancient, the coal mines in 

 Hocking Valley and the natural-gas fields. 

 Further information may be obtained from the 

 Permanent Secretary of the Association, Dr. L. 

 O. Howard, Cosmos Club, Washington, D. C, 

 and from the Local Secretary, Professor B. F. 

 Thomas, Ohio State University. 



The societies meeting in affiliation with the 

 Association are as follows : 



The American Forestry Association will meet 

 on Tuesday and Wednesday, August 22d and 

 23d, in Horticultural Hall. Hon. James Wilson, 

 Washington, D. C, President; G. P. Whittle- 

 sey, Washington, D. C, Secretary. 



The Geological Society of America will meet on 

 Tuesday, August 22d, at the same time and 

 place with Section E. B. K. Emerson, Amherst, 

 Mass., President; H. L. Fairchild, Rochester, 

 N. Y., Secretary. 



The American Chemical Society will hold a 

 general meeting on Monday and Tuesday, 

 August 21st and 22d, and the remainder of the 

 week will be given to Section C. Edward W. 

 Morley, Cleveland, Ohio, President; Albert C. 

 Hale, 551 Putnam Avenue, Brooklyn, N. Y., 

 Secretary. 



The Society for the Promotion of Agricultural 

 Science will meet on Friday and Saturday, Au- 

 gust 18th and 19th. B. D. Halsted, New 

 Brunswick, N. J., President; C. S. Plumb, 

 Lafayette, Ind., Secretary. 



The Association of Economic Entomologists will 

 hold its eleventh annual meeting on August 

 18th and 19th. C. L. Marlatt, Washington, 

 D. C, President ; A. H. Kirkland, Maiden, 

 Mass., Secretary. 



The American Mathematical Society will meet 

 on Friday and Saturday, August 25th and 26th. 

 R. S. Woodward, Columbia University, New 

 York, President; F. N. Cole, Columbia Uni- 

 versity, New York, Secretary. 



The Society for the Promotion of Engineering 

 Education will hold its meeting on August 17th, 

 18th and 19th. Albert Kingsbury, Durham, 

 N. H., Secretary. 



The American Folk-Lore Society will probably 

 meet with Section H on Thursday, August 24th. 

 W. W. Newell, Cambridge, Mass., Secretary. 



TIte Botanical Society of America will meet on 

 Friday and Saturday, August 18th and 19th. 

 On Friday, at 4 p. m., business meeting; 8 p. 

 m., address of retiring President; on Saturday, 

 9 a. m., business meeting; 9:30 a. m., and 2 p. 

 m., sessions for reading papers. G. F. Atkin- 

 son, Ithaca, N. Y., Secretary. 



The American Microscopical Society will meet 

 August 16th, 17th and 18th. Henry B. Ward, 

 Lincoln, Neb., Secretary. 



THE CENTENARY OF THE ROYAL INSTI- 

 TUTION. 

 The celebration of the centenary of the 

 foundation of the Royal Institution, London, 

 took iilace in accordance with the plans we 

 have already announced. Commemorative ad- 

 dresses were made by Lord Rayleigh and Pro- 

 fessor Dewar, and at the banquet on June 5th 



