68 NATURE . [January 13, 1923 
eee ne ESS 
urea reacted easily with oxides of nitrogen, the former 
giving nitro-phenols and the latter diphenylamine 
derivatives; s-diphenylurea and_ triphenylurea 
under the same conditions gave a dinitro-diphenyl- 
urea and a_ trinitrotriphenylurea respectively. 
Nitrous acid converted phenylurea and s-diphenyl- 
urea into their nitroso derivatives. Nitric acid con- 
verted phenylurea into phenylurea nitrate, p-nitro- 
phenylurea, and 2-4-dinitro-phenylnitrourea. With 
s-diphenylurea it gave mono-, di- and tetranitro 
derivatives, and with triphenylurea it formed di-, tri- 
and pentanitro derivatives.—(6) H. Ryan and M. 
Sweeney: Phenylmethylurea and nitric acid under- 
went no change in the absence of nitrous acid. In. 
the presence of the latter acid it was converted into 
methylaniline, phenylmethylnitrosamine, and then 
successively into 2- and 4-nitrophenylmethylnitros- 
amine, 2-4-dinitro- and 2-4:6-trinitro-phenyl-methyl- 
amine. With concentrated nitric acid, tetryl was 
formed readily and in a pure condition from the urea. 

Official Publications Received. 
Scientific Reports of the Agricultural Research Institute, Pusa (in- 
cluding the Reports of the Imperial Dairy Expert and the Secretary, 
Sugar Bureau), 1921-1922. Pp. iv+96+6 plates. (Calcutta: Gov- 
ernment Printing Office.) 14 annas. 
The University of Chicago. Bulletin of Information, Vol. 22, No. 4: 
Register of Doctors of Philosophy of the University of Chicago, June 
ee muer 1921. Pp. 96. (Chicago: University of Chicago 
ress.) 
Canada. Department of Mines: Geological Survey. Bulletin No.. 
35, Geological Series No. 42: Relationship of the Precambrian (Beltian) 
Terrain to the Lower Cambrian Strata of South-eastern British Colum- 
bia. By 8. J. Schofield. (No. 1966.) Pp. 15. (Ottawa.) 
Canada. Department of Mines: Geological Survey. Summary 
Report, 1921, Part B. (No. 1959.) Pp. 104B. Summary Report, 
1921, Part E. (No. 1944.) Pp. 61E. (Ottawa.) 
Field Museum of Natural History. Publication 208, Report Series, 
Vol. 6, No. 1: Annual Report of the Director to the Board of Trustees 
for the Year 1921. Pp. 75+16 plates. (Chicago.) 
Sixtieth Annual Report of the Secretary of the State Board of 
Agriculture of the State of Michigan, and Thirty-fourth Annual Report 
of the Experiment Station from July 1, 1920, to June 30, 1921. Pp. 
636. (Lansing, Mich.) 
State of Connecticut. Public Document No. 24: Forty-fifth Annual 
Report of the Connecticut Agricultural Experiment Station; Being 
the Annual Report for the Year ending October 31, 1921. Pp. xi-+445. 
(New Haven, Conn.) g 
Department of the Interior: United States Geological Survey. 
Bulletin 722: Mineral Resources of Alaska; Report on Progress of 
Investigations in 1920. By A. H. Brooks and others. Pp. 266+-xiii 
+8 plates. (Washington : Government Printing Office.) 
Conseil Permanent International pour l’Exploration de la Mer. 
Rapports et Procés-Verbaux des Réunions. Vol. 28: Procés-Verbaux 
(Septembre 1922). Pp. 74. (Copenhague: A. F. Host and Son.) 
Legislative Assembly : New South Wales. Report of the Director- 
General of Public Health, New South Wales, for the Year 1920. Pp. 
vV+195. (Sydney: J. Spence.) 8s. 3d. 

Diary of Societies. 
SATURDAY, JANUARY 13. 
GILBERT WHITE FELLOWSHIP, at 2.15.—Visit to the Geological Museum, 
Jermyn Street. 
NATIONAL UNION OF SCIENTIFIC WORKERS (Annual Council Meeting) 
(at Caxton Hall), at 2.30. 
MONDAY, JANUARY 15. 
CHEMICAL INDUSTRY CLUB (2 Whitehall Court), at 8. 
ROYAL GEOGRAPHICAL SOCIETY (at Aolian Hall), at 8.30.—Lt.-Col. D. 
Cree; The Yugo-Slavia—Hungarian Boundary. 
TUESDAY, JANUARY 16. 
ROYAL INSTITUTION OF GREAT BRITAIN, at 3.—Prof. F. G. Donnan: 
Semi-permeable Membranes and Colloid Chemistry (1). The Theory 
of Ionic Equilibria and Semi-permeable Membranes. 
ROYAL SocreTy OF MEDICINE, at 5.—General Meeting. 
ROYAL STATISTICAL SOCIETY (at Royal Society of Arts), at 5.15.—Dr, 
R. Dudfield and others: Discussion on The Registration of Disease. 
ROYAL PHOTOGRAPHIO SOCIETY OF GREAT BRITAIN, at 7.—J. C. 
Dollman : Address. 
ILLUMINATING ENGINEERING Soctety (at Royal Society of Arts), at 
, 8.—C. E. Greenslade, J. E. 8. White and others: Discussion on the 
Need for Suitable Training in Dluminating Engineering. 
ROYAL ANTHROPOLOGICAL INSTITUTE, at 8.15.—F. W. H. Migeod : 
The Bedde Group of Tribes of N. Nigeria. 
NO. 2776, VOL. III} 

abe 
ROYAL SOCIETY OF MEDICINE (Pathology Section), at 8.30.—Prof. M. 
J. Stewart and Dr. J. le F.C. Burrow: Malignant Spheno-occipital 
Chordoma.—Dr. A. J. Eagleton and Miss E. M. Baxter: The Sero- i 
logical Classification of Virulent B. Diphtheri#.—Dr. C. C, Okelland _ 
Miss E. M. Baxter: The Fermentative Reactions of Virulent B. 
Diphtherie. . i 

ROYAL Society OF MEDICINE (History of Medicine Section), at 5.— 
W. H. S. Jones: Medical Etiquette in Ancient Times.—Dr. ©. 
Singer: The Hippocratic Oath. ‘ 
ROYAL METEOROLOGICAL Soctery, at 7.30.—Dr. C. Chree: Aurora and - 
Allied Problems (Presidential Address). Pred 
ROYAL Society oF ARTs, at 8.—C. A. Klein: Hygienic Methods in 
Painting : the Damp Rubbing-down Process. 
ENTOMOLOGICAL SOCIETY OF LONDON, at 8.—(Annual Meeting). 
ROYAL MicroscopPicaL Socrety (Annual Meeting), at 8.—Prof. F. J. 
Cheshire : The Petrological Microscope and its Optical Evolution 
(Presidential Address). , 
WEDNESDAY, JANvary 17. 
. 
THURSDAY, JANUARY 18. yj 
ROYAL Society, at 4.30.—Probable Papers.—J. Barcroft: Observa- 
tions on the Effect of High Altitude on the Physiological Processes 
of the Human Body.—Prof. E. W. MacBride: Some New Light 
on the Inheritance of Acquired Characters.—C©. F. Cooper: Baluchi- 
therium osborni (2? syn. Indricotherium turgaicum. Borrissyak).— 
J, A. Gunn and K, J. Franklin: The Sympathetic Innervation of 
the Vagina.—H. G. Cannon: The Metabolic Gradient of the Frog’s 
Egg.—Basiswar Sen: The Relation between Permeability Variation 
and Plant Movements.—Dr. H. L. Duke: An Inquiry into an 
Outbreak of Human Trypanosomiasis in a Morsitans Belt to the 
East of Mwanza, Tanganyika Territorv.—Dr. L. Dollo: Le 
Centenaire des Iguanodons (1822-1922), 
LINNEAN Society OF LONDON, at 5.—Capt. G. H. Wilkins: An Account 
of the Shackleton-Rowlett Expedition in the Quest to the Antarctic 
Regions.—Miss Helena Bandulska: The Cuticular Structure of 
certain Dicotyledonous and Coniferous Leaves from the Middle Eocene 
Flora and Bournemouth.—W. R. Sherrin: A Pocket Herbarium of 
the British Mosses. 
LONDON MATHEMATICAL Socrpry (at Royal Astronomical Society), at 
5.—L. J. Mordell: Lecture on An Introductory Account of the 
Arithmetical Theory of Algebraic Numbers, and its recent Develop- 
ments. A 
ROYAL ABRONAUTICAL SocteTY (at Royal Society of Arts), at 5.30.— 
Major J. D. Rennie: Flying Boats. 
tees OF MINING AND METALLURGY (at Geological Society), at 
5,30. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 6.—G. H. Nelson: Works 
Production. “ 
CHEMIOAL Society, at 8. one P 
Royal Society OF MEDICINE (Dermatology Section), at 8.30.— 
Dr. J. W. McNee and Dr, A. M. H. Gray: A Chemical and Histo- 
logical Study of a Case of Sclerema neonatorum.—J. E. A. MeDonah: 
The Use of Manganese as a Chemo-therapeutic Preparation 


FRIDAY, JANUARY 19. 
Royat Society or Arts (Indian Section), at 4.30—The Earl of 
Ronaldshay : A Clash of Ideals as a Cause of Indian Unrest. 
‘ROYAL SOCIETY OF MEDICINE (Otology Section), at 5.—Dr, L. Turner 
and J. S. Fraser: Demonstration of Labyrinthitis as a complication 
of Middle Ear Suppuration. 
INSTITUTION OF MECHANICAL ENGINEERS, at 6,—L. Pendred: The 
Problems of the Engine Indicator.—Prof. F. W. Burstall: A New | 
Form of Optical Indicator—W. G. Collins: Micro-indiecater for 
High-speed Engines.—H. Wood: R.A.E. Electrical Indicator for — 
High-speed Internal-Combustion Engines, and Gauge for Maximum 
Pressures. 
JUNIOR INSTITUTION OF ENGINEERS, at 7.30.—S. C. Saunders: 
Paraffin as Fuel for Marine Motors.—T, H. Sanders: Laminated 
Springs. S 
ROYAL SocrETy OF MEDICINE (EHlectro-Therapeutics Section), at 8.30. 
RoyaL INSTITUTION OF GREAT BRITAIN, at 9.—Sir James Dewar : 
Baer Films as Detectors: Stream Lines; Vortex Motion, and 
Sound. 7 Fs 
SATURDAY, JANUARY 20. 
ROYAL INSTITUTION OF GREAT BRITAIN, at 3.—Sir Walford Davies : 
Speech Rhythm in Vocal Music (1). 
PUBLIC LECTURES. 
THURSDAY, JANUARY 18. 
LONDON HOospPitaL MEDICAL COLLEGE, at 4.30—W. A. M. Smart: 
The Mathematical Basis of Physiological Problems. (Succeeding 
Lectures on January 25, February 1, 8, 15, 22, and March 1 and 8.) 
UNIVERSITY COLLEGE, at 5.30.—J. C. Fliigel: The Psychology of 
Folklore. ‘ 1 
K1in@’s COLLEGE, at 5.30.—Prof. W. Barthold : The Nomads of Central 
Asia. (Succeeding Lectures on January 25, February 1, 8, 15, and 22.) 
SATURDAY, JANUARY 20. 
HORNIMAN MUSEUM (Forest Hill), at 3.30.—Miss M. A. Murray: Ancient 
Egypt and the Aegean Islands. 4 
