JUiNE 4, 1908J 



NA TURE 



115 



ponent of wave forms produced by components combined in 

 different phases may enable us to distinguish one wave 

 form from another, although, as has been proved experi- 

 mentallv, the forms must be different. 



John G. McKendrick. 



COLOUR PHOTOGRAPHY. 



'T'HE second annual exhibition of the Society of Coloui 

 -'■ Photographers will be open at 24 Wellington Street, 

 Strand, until June 27. It includes about 230 examples 

 prepared by the various methods that are now available. 

 The section of transparencies on Lumiere's autochronio 

 plf.tes is the largest ; there are a few reproductions of 

 autochromes, some pinatype transparencies, transparencies 

 bv the Sanger-Shepherd process, a good show of three- 

 colour prints prepared with the Rotary Company's tissues 

 and with the Autotype Company's tissues, some pinatype 

 three-colour prints, and a few miscellaneous examples. 

 It is clear that all these methods can be made to give 

 good results, but in every section there is evidence that 

 success cannot be expected without skill and practice. 



There ar^ no transparencies that surpass, if any equal, 

 ihe examples of the Sanger-Shepherd process exhibited by 

 Messrs. Sanger-Shepherd and Co., but w-e are glad to see 

 some excellent autochromes, such as Nos. to8, 113, and 

 114 by ilr. J. C. Warburg, and No. 8g by Mr. Maurice 

 Meys, as autochrome plates present the simplest method 

 yet known for getting colour results. Many of the auto- 

 chromes have an unpleasant coloured granulation obvious 

 to anyone of keen vision when the plate is held at the 

 normal distance from the eye. This is doubtless due to 

 the grouping together into patches of the similarly coloured 

 starch grains, and its absence hi some examples may 

 justify the hope that the makers can more thoroughly mix 

 the differently coloured grains now than heretofore. 



The application of autochrome plates to photomicro- 

 graphy is well exemplified by Drs. O. Rosenheim and 

 H. R. Hurrv. These gentlemen also show photomicro- 

 graphs of the starch grain itself, and the area of the black 

 filling between the coloured grains is larger than one would 

 have expected, probablv larger in the particular plate 

 photographed than in many other plates. Mr. Welborne 

 Piper's copies of autochromes on autochrome plates are 

 very interesting as showing the result of attempts to 

 multiply these colour photographs by exposure in the 

 camera and also by superposition. It is clearly possible 

 to use an autochrome that has not been reversed in the 

 making as a negative from which to prepare other auto- 

 chromes. Of the prints on paper, those by Mr. H. J. 

 Comley, the secretary of the society, and by the Rotary 

 Photographic Company are specially good, the latter show- 

 ing excellent portraits of the German Emperor ar \ 

 Enipress and of Prof. Ostwald. 



UNIVERSITY AND EDUCATIONAL 

 INTELLIGENCE. 



C.\MERIDGE. — Lord Raylcigh will visit Cambridge on 

 Tuesday, Wednesday, and Thursday, June 16, 17, and 18, 

 in order to be installed as Chancellor. .At 4 o'clock on 

 Tuesday, June 16, he will open the new extension of the 

 Cavendish Laboratory. On Wednesday, June 17, the 

 Chancellor will hold a lev^e of members of the Senate in 

 the Fitzwilliam Museum at 11.30. On the same day there 

 will be a Congregation at 3.15 p.m., at which honorary 

 degrees will be conferred. The Chancellor will visit the 

 colleges on the morning of Thursday, June 18, and will 

 be received at the gate of each college at times which 

 will be notified. 



Mr. A. C. Pigou, King's College, has been elected pro- 

 fessor of political economy in succession to Mr. Alfred 

 Marshall, who has resigned the chair. 



Dr. Hobson has been re-appointed as Stokes lecturer in 

 mathematics, and Dr. Baker as Cayley lecturer in mathe- 

 matics, each for five vcars from Michaelmas, 190S. 



The Bradford City Council has resolved to extend the 

 technical college at a cost of 19,000!., including equip- 

 ment and machinery. 



A COURSE of three lectures on " Plankton " will be 

 given by Dr. G. Herbert Fowler at University College 

 on June' 10, 15, and 23 at 5 p.m. The lectures are to be 

 addressed to advanced students of the University of London 

 and -to others interested in zoology ; they will be open to 

 the public without fee or ticket. 



Mr. R. N. Rl-dmose Brown has been appointed to the 

 newly instituted lectureship in geography in the University 

 of Sheffield. Mr. Brown accompanied the Scottish 

 .Antarctic Expedition in 1902 as naturalist to the expedition. 

 He acted in 1906 as Special Commissioner, under the 

 Indian Government, for the investigation of the pearl 

 oyster fisheries of the Mergui .Archipelago. 



The International Congress of Historical Science is to 

 be held in Berlin on August 6-12. The work of the 

 congress will be carried on in general and sectional meet- 

 ings. .Among the eight sections are sections on Oriental 

 history ; history of Greece and Rome ; history of civilisa- 

 tion and the history of thought, media;val and modern ; 

 sciences subsidiary "to history (archives, libraries, chrono- 

 logy, diplomatic, epigraphy, genealogy, historical geo- 

 graphy, heraldry, numismatics, palaeography, study of 

 seals). Copies of the programme can be obtained from the 

 secretary of the congress. Dr. Caspar, Kaiser-.Allee 17, 

 Berlin W. 15. 



A COMBINED examination for twenty-three medical 

 entrance scholarships and exhibitions of an aggregate total 

 value of about 1500/., tenable in the faculties of medical 

 sciences of University College, King's College, and in the 

 medical schools of King's College Hospital, St. George's 

 Hospital, W'estminstcr Hospital, and the London School 

 of Medicine for Women, will be held in London by the 

 London Inter-collegiate Scholarships' Board on Sep- 

 tember 22 and following days. Full particulars and entry 

 forms may be obtained on application to the secretary of 

 the board, Mr. Alfred E. G. Attoe, University College, 

 Gower Street, London, W.C, or to the deans or secre- 

 taries of the medical schools concerned. 



The establishment of the proposed university for Bristol 

 and the west of England, to which frequent reference has 

 been made in these columns, will make desirable a scheme 

 of cooperation between the Bristol University College and 

 the Merchant Venturers' Technical College. The Society 

 of Merchant Venturers has had the matter under con- 

 sideration from time to time, and the proposals of the 

 society, signed by its treasurer, have been printed and 

 circulated. The technical college is carried on in three 

 departments, viz. a secondary school, adult day classes for 

 the study of the higher branches of applied science and 

 technology, and evening classes in technological and com- 

 mercial subjects for artisans. Only a part of the work 

 is of university standard, and such part the society pro- 

 poses to submit to the control of the new university, but 

 to continue as before the remaining larger part of the 

 teaching not of universitv standard. The society has ex- 

 pressed its willingness to' undertake the faculty of applied 

 science and engineering in the proposed university, and 

 to hand over this work to academic control, a scheme the 

 society maintains would prevent friction and overlapping. 

 These' proposals differ in essential respects from those of 

 the university committee, which appears to have thrown 

 out the suggestion that the society's secondary school 

 should be discontinued in connection with the technical 

 college : that the college buildings in Unity Street should 

 be transferred to the University and used only for applied 

 science and engineering, and that another school of 

 ■ technology under a composite committee should be estab- 

 lished. To provide a new site and new secondary school — 

 as was done in the similar case of University College, 

 London— would cost, it is said, some 28,000?., and the 

 monev does not seem to be forthcoming. The other 

 suggestions of the universitv committee fail at present to 

 meVt with the approval of the society, but we are hopeful 

 that when the monev necessary for the establishment of 

 a new university is' available it will prove possible by 

 mutual concessions to develop a plan which, while utilising 

 all work of university standing at present being done, will 

 in no way interfere with other good educational work 

 being accomplished in the city. 



NO. 2014,, VOL. 78I 



