June 



1910J 



NA TURE 



497 



bees behave in this way they act as a lure to those out- 

 side the hive, and that each bee elevates the tip of her 

 abdomen, and exposes a membrane there, situated between 

 the fifth and the sixth dorsal segments. This membrane- 

 gives off a pungent scent, which the waving of the wings 

 ' -geminates; no doubt the scent attracts bees that have 

 their way to the entrance. A bee that has had a 

 culty in finding the entrance, before she passes into 

 hive, stands for a short while on the alighting board 

 an and expose her scent membrane. Thus, when many 

 > are uncertain about the position of the entrance, they 

 are attracted there by the scent. A description of this 

 scent-producing organ of the worker honey-bee, and the 

 ■" ; ation of the wings to which our correspondent refers, 

 be found in Mr. F. W. L. Sladen's " Queen-Rearing in 

 England," published at the office of the British Bee 

 Journal, 23 Bedford Street, Strand, W.C. 



A NATIONAL committee (of which the King, when Prince 

 of Wales, acted as honorary chairman), representative of 

 the colonies, of the Navy, of the shipping industry, and of 

 the learned societies, has been formed under the auspices 

 of the British Empire League to secure the erection in 

 London of a memorial to Captain Cook. It is a reproach 

 to the nation that no recognition should have been paid 

 to the memory of a man whose intrepid explorations re- 

 sulted in such notable additions to the British Dominions, 

 and whose scientific work has been of the greatest value 

 to mankind. For the purpose a fund of at least 3000?. 

 will be needed, to which the committee now invites con- 

 tributions. Nearly one-third of this amount has been 

 subscribed by members of the committee. Cheques should 

 be crossed Robarts, Lubbock and Co., and made payable 

 to the treasurer, Lord Brassey, G.C.B., 24 Park Lane, 

 London, W. 



The interesting speeches made on the occasion of the 

 presentation of a marble bust of the late Dr. John Hopkin- 

 son, F.R.S., to the Institution of Electrical Engineers on 

 November n, 1909, are printed in the journal of the 

 institution (vol. xliv.). In making the presentation on 

 behalf of his mother. Prof. B. Hopkinson did not claim 

 too much when he said that " so long as dynamos are 

 made, so long will the designers of such machinery, and 

 the inventors of new forms of it, have first to master and 

 then to use the fundamental principles which my father 

 laid down." Mr. W. M. Mordey, president of the institu- 

 tion, in expressing the thanks of the council and members 

 to Mrs. Hopkinson for the gift, pointed out some of the 

 landmarks laid down by Dr. Hopkinson in connection with 

 the development of electrical engineering. Dr. Hopkinson 

 not only raised the knowledge of the dynamo from chaos 

 into engineering and scientific order, but also made valu- 

 able contributions to subjects of purely physical interest. 

 He was distinguished as an investigator, inventor, and 

 teacher, and the marble bust at the Institution of Electrical 

 Engineers will remind all who see it of a life to be emulated 

 as well as honoured. 



The third annual exhibition of the Society of Colour 



otographers is now open at 24 Wellington Street, Strand, 



1 will close on July 9. There is manifest a general 



iling up in quality, and many, such as Mr. Hollyer's 



:e-colour collotypes and Mr. Clifton's three-colour carbon 



Its, show what skilful manipulation can do with methods 



t allow much scope for error. Among the transparencies 



the autochrome and similar processes are several 



imples on the new " Dufay " plates. The Thames Plate 



Company is bold enough to show four duplicates made from 



the same negative, and though any one alone might perhaps 



NO. 2 12 I, VOL. 83] 



be accepted as satisfactory, the slight differences between 

 the colours in the four prints demonstrate in an interesting 

 way the difficulty of making two colour photographs exactly 

 alike. Messrs. Mees and Pledge show an interesting series 

 of photomicrographs of eight different kinds of three-colour 

 screens, with various spectra- and resolving power tests of 

 colour plates. Dr. Mees also shows one of Mr. Ives's new 

 colorimeters. The exhibition presents in a small space an 

 excellent summary of the present condition and possibilities 

 of colour photography from a practical point of view, 

 together with many analytical results of especial interest to 

 the scientific student. 



The seventy-eighth annual meeting of the British 

 Medical Association is to be held in London on July 22—29. 

 The main business of the congress will be done in sections, 

 which are, with their presidents, as follows : — anjesthetics, 

 Dr. F. W. Hewitt, M.V.O. ; anatomy. Prof. Arthur Keith; 

 bacteriolog}'. Dr. C. J. Martin, F.R.S. ; dermatology, Dr. 

 P. Abraham ;' diseases of children. Dr. A. E. Garrod ; 

 gynaecology and obstetrics. Dr. Mary Scharlieb ; laryngo- 

 logy, Mr. H. Tilley ; medical sociology, Dr. J. A. Mac- 

 donald ; medicine. Dr. R. W. Philip ; navy, army, and 

 ambulance. Colonel A. Clark; odontology, Mr. J. H. 

 Mummery ; ophthalmology, Mr. C. Higgens ; otology. Dr. 

 E. Law ; pathology, Mr. S. G. Shattock ; pharmacology 

 and therapeutics. Prof. A. R. Cushny, F.R.S. ; physiology. 

 Prof. W. H. Thompson ; psychological medicine and 

 neurology, Dr. T. B. Hyslop ; radiology and medical elec- 

 tricity, Mr. J. M. Davidson ; State medicine. Sir William 

 Foster; surgery, Sir Victor Horsley, F.R.S.; and tropical 

 medicine, Dr. F. M. Sandwith. The address in medicine 

 will be delivered on July 27 by Dr. J. Mitchell Bruce, and 

 the address in surgery on July 28 by Mr. H. G. Barling. 

 The second annual meeting of the Medical Library Associa- 

 tion, under the presidency of Prof. Osier, will be held on 

 the mornings of July 27 and 28, at which papers will be 

 read dealing with matters likely to be of practical interest 

 and assistance to medical librarians, members of library 

 committees, and readers. It is also intended to hold a 

 bibliographical exhibition in connection with this meeting. 



The Horniman Museum at Forest Hill continues to 

 advance in popularity and in the interest of its collections. 

 In the ethnological department the most important 

 accessions during the past year have been collections from 

 the north-west of North America and the Eskimo region, 

 and a series illustrating the structure of the anthropoid 

 apes. Arrangements have also been made for a good series 

 of illustrative lectures. In that of natural historv some 

 progress has been made in collecting a series describing the 

 structural adaptations of animals to the chief modes of 

 progression, and increased accommodation for vivaria and 

 aquaria has been provided. 



The National Geographic Magazine for April, under the 

 title of "The Spirit of the West," continues the graphic 

 and well-illustrated series of articles by Mr. C. J. 

 Blanchard, of the United States Reclamation Department, 

 on the extensive works completed and in progress for 

 extending irrigation in the Mississippi Valley. Thirteen 

 million acres now produce harvests valued at 50,000,000/., 

 and support more than 300,000 families at present, with 

 hopes of large increase in the immediate future. One of 

 the most important of these works is the gigantic concrete 

 dam, said to be the highest in the world, which bars the 

 canon of the Shoshone River collecting the drainage from 

 the lofty mountains east of Yellowstone Park. This rises 

 to a height of 328 feet, slightly higher than the summit 

 of the dome of the Capitol at Washington. 



