236 NATURE 
[May 2, I91 
Die neuen Vererbungsgesetze. 
Correns. Pp. vilit+75. (Berlin: 
traeger.) 2 marks. 
Experimental Domestic Science. By R. H. Jones. 
Pp. ix+235. (London: W. Heinemann.) 2s. 6d. 
Matter and Energy. By F. Soddy. Pp. 256. 
(London : Williams and Norgate.) 1s. net. 
Ueber Vererbung und Rassenhygiene. By Prof. H. 
Bayer. Pp. iv+50+5 plates. (Jena: G. Fischer.) 
2 marks. 
Trattato di Chimica Organica Generale e Applicata 
By Prof. C. | 
Gebrtider Born- 
all’ Industria. By Prof. E. Molinari. Seconda 
Edizione. Pp. xxiv+1087. (Milano: U. Hoepli.) 
18 lire. 
Modern Science and the Illusions of Prof. Bergson. 
By the Hon. S. R. Elliot. Pp. xix+257. (London : 
Longmans and Co.) 5s. net. 
Cocoa: its Cultivation and Preparation. By 
H. Johnson. Pp. ix+186. (London: J. Murray.) 
5s. net. 
The National Physical Laboratory. — scored Re- 
searches.- Vol. viii., 31912. Pp. 251+ plates. 
(Teddington : The National Physical Daberaeen) 
The National Physical Laboratory. Report for the 
Year ror. Pp. 103+plates. (Teddington: The 
National Physical Laboratory.) 
For and Against Experiments on Animals. By 
S. Paget. (London: H. K. Lewis.) 3s. 6d. net. 
Handbuch der Pharmakognosie. By A. Tschirch. 
Lief. 29 and 30. Pp. 641-775+xi. (Leipzig: C. H. 
Tauchnitz.) Each 2 2 marks. 
DIARY OF SOCIETIES. 
THURSDAY, May 2. 
Royat Society, at 4.—Election of Fellows.—At 4.30.—Petrifications of the 
Earliest European Angiosperms: Dr. Marie C. Stopes.—The Distribution 
of Oxydases in Plants and their 7#Ze in the Formation of Pigments : Dr. F. 
Keeble and Dr. E. F. Armstrong.—-The Manifestation of Active Resistance 
to the Growth of Implanted Cancer : Dr. B. R. G. Russell. —The Nature 
of the Immune Reaction to Transplanted Cancer in the Rat: Dr. W. H. 
Woglam.—On the Instability of a Cortical Point: T. G. Brown and 
Prof. C. S. Sherrington, F.R.S —The Measurement of 7>yfanosoma 
rhodestense: Dr. J. W. W. Stephens and Dr. H. B. Fantham. 
Roya InstTiTuTION, at 3.—Explorations in the Canadian Rocky Moun- 
tains: Prof. J. Norman Collie, F.R.S. 
Linnean Society, at 8.—On the Structure of the Paleozoic seed Lagengo- 
stoma ovoides, Will: Miss T. L. Prankerd.—Additions to the Flora of 
Western and North-Western Australia: Dr. Karl Domin.—Freshwater 
Rhizopoda from the States of New York, New Jersey, and Georgia, 
U.S.A. ; with a Supplement on the Collection from the Seychelles: G. H. 
Wailes.—Ligidium hypnorum, a Woodlouse new to Britain: W. M. 
Webb.—New Light on the Linnean Herbarium: The General Secretary. * 
INSTITUTION OF ELECTRICAL ENGINEERS. at 8.—Adjourned Discussion : 
The Causes Preventing the More General Use of Electricity for Domestic 
Purposes. 
FRIDAY, May 3. 
Romee INSITE ORION, at 9.—The Use of Pedigrees : W. C. D. Whetham, 
InsTITUTION OF MECHANICAL ENGINEERS, at 8.—Resumed discussion : 
Tenth Report to the Alloys Research Committee: on the Alloys of 
Aluminium and Zinc: Prof, J. O. Arnold. 
Geotoaists’ AssocraTion, at 8.—The Geology of Sunderland and District 
with special reference to the Whitsuntide Excursion: Dr. D. Wi oolacott’ 
MONDAY, May 6. 
Society OF ENGINEERS, at 7.30.—The Effect of Intermittency in Limiting 
Electric Traction for City and Suburban Passenger Transport: W. 
Yorath Lewis. 
ARISTOTELIAN SOCIETY, at 8.—Imagery and Memory: Beatrice Edgell. 
oye cee Society, at 8.30.—United Nigeria: C. L. Temple, 
Royat Society or Arts, at 8.—Heavy Oil Engines: Captain H. R. 
Sankey, k.E. 
Victoria INSTITUTE, at 4.30.—International Arbitration in the Greek 
World: Marcus N. Tod. 
Society or Cuemicat InpustRy, at 8.—A New Apparatus for the C oking 
Tests of Coal: R. Lessing.—A New Method for the Determination of 
Ferrocyanides : H. E. Williams.—A Drying Oven: J. H. Coste.—India 
Rubber as a Protective Colloid: E. W. Lewis and H. Waumsley. 
TUESDAY, May 7. 
Roya. INstITUTION, at 3 —Insect Distribution, with special reference to 
the British Islands; F. Balfour Browne. 
Royat ANTHROPOLOGICAL INSTITUTE, at 8.15.—Geographical Distribution 
of Certain Primitive Appliances : H. Balfour. 
ZooLocicat Society, at 8.20.—Lantern and Kinematograph Demonstra- 
tions of Photographs of Fishes and Aquatic Animalsin Natural I/lumina- 
tion: Dr. Francis Ward.—On a Collection of Fishes made by Mr. 
A. Blayney Percival in British East Africa to the East of Lake Baringo : 
G. A. Boulenger, F.R.S.—Studies in the Fossorial Wasps of the Family 
Scoliidz, Sub-families Elidinze and Anthoboscin#: Rowland E. Turner. 
—Notes on the Spanish Ibex: Abel Chapman. 
NO. 2218, VOL. 89] 
R6nTGEN Society, at 8.15.—The Education of the Brain, considered as 
an Electrical Machine: W. Deane Butcher. _ 
Roya Society oF Arts, at 4.30.—Colonial Vine Culture ; Alan Burgoyne, 
M.P. 
WEDNESDAY, May 8. 
Royac Society or Arts, at 8.—British Rule in Nigeria: E. D. Morel. 
THURSDAY, May 9. ‘ 
Rovat Society, at 4.30.—Prolable Papers: On the Variation with Tem- 
perature of the Rate of a Chemical Change, with an Appendix by Prof. 
W. Esson, F.R.S. : Dr. A. Vernon Harcourt, F.R.S.—Some Phenomena of 
Sun-spots, and of Terrestrial Magnetism: Dr. C, Chree, F.R.S.—On the 
Ultimate Lines and the Quantities of the Elements producing the Lines 
in Spectra of the Oxyhydrogen Flame and Spark: Sir W. N. Hartley, 
F.R.S., and H. W. Moss.—The Transformations of the Active Deposit 
of Thorium : E. Marsden and C. G.. Darwin,—On the £ Particles 
Reflected by Sheets of Matter of Different Thicknesses : W. Wilson. 
Rovyat Institution, at 3.—Recent Explorations in the Canadian Rocky 
Mountains: Prof. J. Norman Collie, F.R.S. 
INSTITUTION OF ELECTRICAL MKNGINEERS, at 7.30.—The Bela of 
D.C. Watt-hour Meters, more especially for Traction Loads: S. W. 
Melsom and H. Eastland.—Electric Meters on Variable Loads: Prof. D. 
Robertson. 
FRIDAY, May to. : 
Royat INnsTITUTION, at 9.—The Gaumont Speaking Kinematograph Films : 
Prof. W. Stirling. 
Roya. ASTRONOMICAL SOCIETY, at 5. ? 
MALACOLOGICAL Society, at 8.—A Synopsis of the Recent and Tertiary 
Fresh-water Mollusca of the Californian Province: Harold Hannibal.—On 
Dosinia lucinalis, Lam., and its Synonyms: A. J. Jukes-Browne, F.R.S. 
—New Generic Names and New Species of Marine Mollusca: T. Iredale. 
Puysicar Society, at 8.—A Method of Measuring Small Inductances: S. 
Butterworth.—The Conversion of Starch into Dextrin by X-Rays: H. A. 
Colwell and Dr. S. Russ.—Dzmonsrration of Apparatus for showing the 
Generation of Electricity by Carbon at High Temperatures: Dr. J. A. 
Harker and Dr. G. W. C. Kaye.—Calibration of Wave-meters for Radio- 
telegraphy : Prof. G. W. O. Howe. 
InstiTUTE OF METALS, at 8.30.—The Inner Structure of Simple Metals: 
Sir J- A. Ewing, K.C.B., F. -R.S. 
CONTENTS. PAGE 
Chemical Spectroscopy. By Prof. E. C. C. Baly, 
Pleo nF 211 
The Constitution of the Silicates. “ByDr. C.H.Desch 212 
Butishesvegetation. By A. DiC Tees.) rere ae 
Recent Botanical Publications. = 2 2 .. . 2 =. 283 
QurnjBookshelf, .... ... eee = e-em 
Letters to the Editor :— 
Burdon Sanderson and Vitalism.—Dr. J. S. Haldane, 
RAR S. 5. 215 
A Peculiarity in the Shadows Observed ‘during a a 
Partial Eclipse of the Sun.—Edwin Edser .. . 216 
Halo during the Solar Eclipse of April sir 
Marie C. Stopes .. 217 
The Smoke Problem.—Prof. J.) B. Cohen, F.R.S.; 5 
The Reviewer .. = oe ey 
Remains of Prehistoric Horse in the Stort Basin. — 
Rev. Dr. A. Irving . . 218 
An Anode Dark Space in the Discharge i in Oxygen. — 
BPEVVeeASSOn 5. % es oy 
May Meteor-showers. —John R. Henry . «) kant See 
The Solar Eclipse of April 17. ee wee) By Dr. 
Walkiamny..S: Lockyer. 22) ae. Sioidec So) 2) 
Colonial Surveys. By H. G. tae. 5) 2 emo 
Notes > OLS So GemeoeA vet ©. B23} 
Our Astronomical Column: — ; 
Astronomical Occurrences for May ....... ~- 227 
Cometary Spectra. (Z//ustrated.)........ . 227 
The Spiral Nebulae . Rie seto 125 
Leeds University: New ‘Textile Extension ... . 228 
Memoirs of the Geological Survey. BY G. a . E C. 229 
Discussions of Climatology ....... Ape 29> 
Bird Notes. ByR.L. . Mee 5 ey! 
University and Educational Intelligence ee cin 23)2 
Nocietiesiand Academies = sues) >.) Neen 
BooksyReceived . . . . — (emma - Meio mE=OD 
DiarylofiSocieties . . . . . Seewee >. «7. seanemEeRD 
SUPPLEMENT. Ho 
Human Geography . . <a 
Chemistry in its Relation to Manufacture. Bye 
GaayeMe. . 6 CE! ito. gE 
Flowers and their Insect Guests .......-.. v 
Cosmoronies, Old and New).p eee cies e re vi 
Tannins, Dyes, and Colours. ByC.S. ...... vil 
Cytological Problems. By] gS ieee. <1) eel 
An American Manual of Farm Livestock. Bye 
Dr. Francis H. A. Marshall. . . tet «tus 
Technology and Literature. By R. Ss. 1a ae x 
