5^4 



NA TURE 



[October 21, 1922 



showing the relative receiver current in the testing 

 apparatus necessarj' for the threshold of audition 

 at various pitches. It is found that unless the nerve 

 endings or the nerves are destroyed, hearing is 

 normal if the tones are sufficiently intense. The 

 internal ear mechanism lowers the threshold of 

 audition but mechanical resonance of this structure 

 is not responsible for tone perception. — C. Lundsgaard 

 and D. D. Van Slyke : The quantitative influences 

 of certain factors involved in the production of 

 cyanosis. Cyanosis depends on the mean concentra- 

 tion of reduced haemoglobin in the blood. It is shown 

 mathematically that 40 per cent, of venous blood 

 must be mixed with arterial blood to obtain the 

 necessary concentration of reduced haemoglobin. 

 Cyanosis usually becomes perceptible when this 

 concentration is 5 gms. per 100 c.c. of blood, but 

 various influences may cause it to vary from 4-6 gms. 

 per 100 c.c. of blood. 



Official Publications Received. 



Recueil de 1'Institut Botanique Leo Errera. Tome 10, fascicule 2. 

 Pp. 83-456. (Bruxelles : M. Lamertin.) 



Canada. Department of Mines : Geological Survey. Summary 

 Report, 1921, Part A. Pp. 121a. Summary Report, mil. Part D. 

 Pp HOD. (Ottawa.) 



Canada. Department of Mines : Geological Survey. Memoir 131, 

 No. 112 Geological Series : Kenogami, Round, and Larder Lake 

 Areas, Timiskaming District, Ontario. By H. C. Cooke. Pp. iv + 64. 

 (Ottawa.) 



Sixtieth Annual Report of the Government Cinchona Plantations 

 and Factory in Bengal for the Year 1921-22. Pp. 4 + xii. (Calcutta : 

 Bengal Secretariat Bonk Depot.) 8 annas. 



Memoirs of the Indian Meteorol. igical I icpartment. Vol. 23, Part "> : 

 On Cleaning and Refilling various Types of Barometer, together 

 with a Description of several usual Patterns. By Dr. E. P. Harrison. 

 Pp. 145-156+5 plates. (Calcutta: Government Printing Office.) 

 1-8 rupees ; 2s. 



Memoirs of the Indian Museum. Vol. 5 : Fauna of the Chilka 

 Lake. No. 10 : The Hydrography anil Invertebrate Fauna of Rambha 

 Bay. By R. B. Seymour Sewell and Dr. N. Annandale. Pp. 679-710 

 + plates 32-43. (Calcutta: Zoological Survey of India.) 5 rupees. 



1S22 G. J. Mendel 1922. Herdcnkingsnummer van Genetica. 

 Js T ederlandsc.h Tijdschrift voor ErtY-lijkheids- en Afstammingsleer. 

 Pp. 193-384. ('s Gravenhage : M. Nijhoff.) 8 gld. 



Papers from the Geological Department, Glasgow University. 

 Vol. 5: Octavo papers from L918 to 1921. (17 papers.) Vol. 6: 

 Quarto papers from 1915 to 1922. (15 papers.) (Glasgow: Maclehose 

 Jackson and Co.) 



Report of the Danish Biological Station to the Board of Agriculture, 

 xxviii., 1922. By Dr. C. G. Joh. Petersen. Pp. iv+103 + 5 Tables. 

 (Copenhagen: G. E. C. tool I 



Museums of the Brooklyn Institute of Arts and Sciences. Report 

 upon th'' Condition and Progress of the Museums for the Year ending 

 December 31, 1921. By William llcnrv Fox. Pp. 56. (Brooklyn, 

 N.Y'.) 



University of Bristol. Calendar. 1922-23. Pp.374. (Bristol.) 



Proceedings of the Aristotelian Society. New Series. Vol. 22 : 

 Containing the Papers read before the Society during the Forty-third 

 Session, 1921-1922. Pp. ii + 242. (London: Williams and Norgate.) 



~ Year Book of the Michigan College of Mines. 1921-1922, Houghton, 

 Michigan. Announcement of Courses, 1922-1923. Pp.127. (Hough- 

 ton. Mich.) 



Public Works Department. Government of India. Triennial Review 

 of Irrigation in India, 1918 1921. Pp. viii + 222. (Calcutta: Govern- 

 ment Printing Office > 5 rupees. 



Records ol the Survey ol India. Vol. 15 (Supplementary to General 

 Report 1919 20) Lnnual Reports of Parties and Offices, 1919-20. 

 ~ epared nndei tie direction oi Col. C. II. D. Ryder. Pp. 134+10 

 eneral "t India.) 4 rupees ; 8s. 

 lural Experiment Station. Memoir 54: 

 int England. By Inane Phillips. Pp. 

 iductlon ol new Strains of Corn for New 

 II. Love, and F. P. Bussell. Pp. 20.V2C.N. 

 • tudv ot Dairying on 149 Farms in Broome 

 c. Misner. Pp. 269-444. Bulletin 410 : 

 he- Fruit of the Apple ; with Particular 



maps, (i lalcutta : Survey 

 Cornell University Igric 

 Horse Raising in t olonial 

 883-942. Bull, tin 108: I' 

 Y'ork. By C. H. Myers, II 



Bulletin 409 : In Ei oi 



County. New York. By E, 

 Studies on Insei ts affi cti 



Reference to the Characteristics of tin- Resulting Scars. By Harry 

 Hazelton Knight. Pp. 445-498+42 plates. (Ithaca, X.Y.) 



Diary of Societies. 



MONDA Y, October 23. 

 Institution of Mechanical Engineers (Graduates' Section), at ;. 



It. I). Gauld : Some Factors in the Design of Steam Locomotives. 

 Royal Society of Medicine (odontology Section), at 8. — W. R. 



Ackland : Some Considerate ins for Preventive Dentistry (Presidential 



Address i. 



TUESDAY, OCTOBER 24. 



Royal SOCIETY or MEDICINE (Medicine Section), at 5.30. — Dr. Newton 

 Pitt: Presidential Address. — Major-Gen. Sir John Moore and 

 others: Glanders and Anthrax. 



Zoological SOCIETY of London, at 5.30. — The Secretary: Report 

 on the Additions made to the Society's Menagerie during the months 

 of June, July, August, and September 1922 -Exhibition of Photo- 

 graphs of Zebrasand Oryx from Kenya. — E. T Newton : Exhibition 

 of a Tanned Skin of a Frog.— R. H. Bum.- and Prof. J. P. Hill: 

 The Foetal Membranes of Chiromys. R. KirkpatricK ami Dr. J. 

 Metzelaar : An Instance of Coiumensalism between a Hermit-Crab 

 and a Polyzoon. 



Institute of Marine Engineers. Inc., at 6.30. — Views Illustrating 

 Industrial Works : Messrs. Bruce Peebles. 



Royal PHOTOGRAPHIC Society of Great Britain, at 8. — E. W. 

 Mellor : Some Landmarks of Ancient Egypt. 



WEDNESDAY, October 25. 

 Newcomen Society (at 17 Fleet Street), at 5. — E. A. Forward : Simon 



Goodrich and his Work as an Engineer. Part I. 1796-1810. 

 Fellowship of Medicine (at 1 Wimpole street), at 8.30. — Dr. E. 



Pritchard : The Feeding of Infants from Birth to the End of the 



Second Year. 



THURSDAY, OCTOBER 26. 

 Chemical Society (at Institution of Mechanical Engineers), at 8. — 



Sir W. H. Bragg and Prof. W. L. Bragg : Tin- Significance of Crystal 



structure. 

 Royal SOCIETY of Medicine (Urology Section), at 8.30. — Sir John 



Thomson Walker: Relation of Calcified Abdominal Glands to 



Urinary Surgery (Presidential Address). 



FRIDAY, October 27. 

 Royal Astronomical Society, at 5. — Geophysical Discussion on the 



Maintenance of the Earth's Electric Charge. Chairman : Sir W. H. 



Bragg. Speakers: Dr. G. C. Simpson, C. T. R. Wilson, and Sir 



A. Schuster. 

 Bo-, vi, mii ii, ty of Medicine (Study of Disease in Children Section), 



it 5 I »i E. Pritchard: Rickets (Presidential Address). 

 Physical society of London, at 5. 

 [K8TIT1 iion OF Mechanical Engineers. at 6. — Adjourned Discussion 



on paper by Prof. A. Bateau: The Use of the Turbo-Compressor 



for attaining the greatest Speeds in Aviation. 

 Junior Institution of Engineers, at 7.30. — Question and General 



Discussion Evening. 

 Royal SOCIETY of Medicine (Epidemiology and State Medicine 



Section), at 8. — Dr. R. J. Ewart : Economics and Tuberculosis. 

 Royal Photographic Society of Great Britain, at 8. — Dr. G. H. 



Rodman : Familiar Flowers in Monochrome. 

 lint \i. soi ii it oi Mi oi' IM (Electro-Therapeutics Section), at 8.30. 

 Di R, Kno\ : (';iidi.i.- I>ciL'no-i- V Survey of the Development 



oi Physical Methods (Presidential Address). 



PUBLIC LECTURES. 



SATURDAY, OCTOBER 21. 

 Horniman MUSEUM (Forest Hill), at 3.30. — Miss M. A. Murray : The 

 Nile in the Life and Religion of the Ancient Egyptians. 



MONDAY, OCTOBER 23. 

 Royal College of Surgeons of England, at 5. — Prof. Shattock : 



Specimens illustrating Caninoma. 

 City of LONDON V.M.C.A. (186 Aldersgate Street), at ('.. — Sir Walter 



Morley Fletcher : Man's Body and the Making of Athletic Records. 



TUESDAY, October 24. 

 School of Omental Studies, at 5. — Prof. Alice Werner: Some 



Bantu Tribes of the Tanganyika Territory. Succeeding Lectures 



on November 7. 21. December 5, 19. 

 Gresham College, at 6. — Sir Robert Armstrong-Jones : Physic. 



Succeeding Lectures on October 25, 26, 27. 



WEDNESDAY, October 25. 

 KING'S College, at 4.30.— Dr. C. Da Fano : The Histology of the 



Nervous System. Succeeding Lectures on November 1, 8, 15, 22, 



29. December band 13. 

 SCHOOL OI omental Studies, at 5. — Mrs. Rhys Davids: How to 



find tin- Real Founder of Buddhism. II. 

 University College, at 5.30. — A. Lloyd - Jones : The Phonetic 



Structure of the Yoruba Language. — L. S. Jast : The Organisation 



of a Great Library. 



THURSDAY, October 26. 



FRIDA Y, October 27. 



Royal College of Surgeons of England, at 5. — Sir Arthur Keith: 

 Result following Resection of the Bowel, illustrated by Experimental 

 Work doin by Mr. T. Gray on Cats. 



Univi asm ' 01,1,1:01: (in Botany Department), at 5. — Prof. A. II. R. 

 Buller: Studies in the Morphology and Physiology of Fungi. Suc- 

 ceeding Lecture on November 3. — At 5.15. — Prof. J. Adams : The 

 New Individualism in Education. 



I'.iiii 01:0 1 011 1 1, 1 101; Women, :it ,">.3o. .1 M. M'Grcgor : Social 

 Life in Athens, as illustrated by Plato. 



SATURDAY, October 28. 

 HORNIMAN Museum (Forest Hill), at 3.30. — F. Balfour-Browne : The 

 Life and Habits of Mason Wasps. 



NO. 2764, VOL. I IO] 



