106 
Weather Signs and how to read them, for Use at 
Sea. By W. Allingham. Pp. 117. (Glasgow: J. 
Brown and Son.) 2s. net. 
Smoke: a Study of Town Air. By Prof. J. B. 
Cohen and A. G. Ruston. Pp. 88. (London: E. 
Arnold.) 5s. net. 
Water Analysis for Sanitary and Technical Pur- 
poses! By H. B. Stocks. Pp. viii+136. (London: 
Griffin and Co., Ltd.) 4s. 6d. net. 
‘Cast Iron in the Light of Recent Research. By 
W. H. Hatfield. Pp. xiii+249. (London: C. Griffin 
and Co., Ltd.) tos. 6d. net. 
Dynamic Meteorology and Hydrography. By Prof. 
V. Bjerknes and others. Part ii.: Kinematics. Pp. 
vii+175 and vol. of plates. (Washington : Carnegie 
ieee) 
Revision of the Amphibia and Pisces of the Permian 
of North America. By Prof. E. C. Case and others. 
Pp. ees (Washington: Carnegie Ynstitu- 
tion. 
The Annual of the British School at Athens. Index 
to Nos. i. to xvi. Compiled by A. M. Woodward. 
Pp. vit144. (London: Macmillan and Co., Ltd.) 
Ios. net. 
Worterbuch der Milkroskopie. 
Dr. G. Stehli. Pp. 06. 
Verlagshandlung.) 
Elementare Mechanik 
Hamel. Pp. xviii+634. 
By H. Giinther and 
(Stuttgart : Franckh’sche 
2 marks. 
ein Lehrbuch. By Prof. G. 
(Leipzig & Berlin: B. G. 
Teubner.) 16 marks. 
Lebensweise und Organisation. Prof. P. Dee- 
gener. Pp. x+288. (Leipzig & Berlin: B. G. 
Teubner.) 5 marks. 
Theorie der Elektrizitat. By Dr. M. Abraham. 
Erster Band. Vierte Auflage. Pp. xviii + 410. 
(Leipzig & Berlin: B. G. Teubner.) 11 marks. 
Maschinen und Apparate der Starkstromtechnilk : 
By G. W. 
(Leipzig & Berlin: B. G. 
ihre Wirkungsweise und Konstrulstion. 
Meyer. Pp. xiv+590. 
Teubner.) 15 marks. 
Mathematical Papers for Admission into the Royal 
Military Academy and the Royal Military College for 
the Years 1905-1911. Edited by R. M. Milne. 
(London : 
Macmillan and Co., Ltd.) 6s. 
Catalogue of 9842 Stars, or all Stars very Con- 
spicuous to the Naked Eve, for the Epoch of rgoo. 
By T. W. Backhouse. Pp. xx+186. (Sunderland: 
Hills and Co.) 
Hints to Autopianists and Users of Player Pianos 
and Piano Players in General. Pp. 46. (London: 
Kastner and Co., Ltd.) 3s. net. 
DIARY OF SOCIETIES. 
THURSDAY, Marcu 28. 
Roya Society, at 4.30.—A Confusion Test for Colour Blindness: Dr. 
G. J. Burch, F.R.S.On the Systematic Position of the Spirochzetes : 
C. Dobell.—The Influence of Selection and Assortative Mating on 
the. Ancestral and Fraternal Correlations of a Mendelian Population: 
E. C. Snow.—The Human Electrocardiogram ; a Preliminary Investi- 
gation of Young Male Adults, to form a Basis for Pathological 
Study : T. Lewis and M. D. D. Gilder.—The Production of Variation in 
the Physiologic al Activity of B. col by the Use of Malachite-Green : 
C. Revis. —(1) Notes on some Flagellate Infections found in certain 
Hemiptera in Uganda; (2) Netes on certain Aspects of the Development 
of 7. gambiense in Gk na feels: : Muriel Robertson.— Antelope and 
their Relation to Trypanoso miasis : 1s IL, Duke. 
Royat INsTITUTION, at 3.—Sexual ince in Butterflies: F. A 
Dixey, F.R.S. 
CHEMICAL SocieTy, at 4.30.—Presidential Address: 
Problems: Prof, Percy F. Frankland, F.R.S. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.—The Power Factor and 
Conductivity of Di-electrics when tested with Alternating Electric 
Currents of Telephonic Frequency at Various Temperatures: Dr. J. A. 
Fleming, F.R.S., and G. B. Dyke. : 
FRIDAY, Marcu 20. 
Rovat InstiTuTION, at 9.—Results of the Application of Positive Rays to 
the Study of Chemical Problems : Sir J. J. Thomson, 0.M., F.R.S. 
GeroLocists’ Association, at 8.—The Geology of South-east Carns urvon- 
shire : W. G. Fearnsides. 
INSTITUTION OF CiviL ENGINEERS, at 8.—-The Eastern Wharf Recon” 
struction, Dundee: C. R. Shaddick. 
NO. 2213, VOL. 89] 
Some Stereochemical 
NATURE 
[Marcu 28, 1912 
SATURDAY, Marcu 30. 
ROSE ORION at 3.—Molecular Physics: Sir J. J. Thomson, O.M., 
F.R 
Essex Fievp Crus, at 6 (at the Essex Museum, Stratford, E sex). eae 
Alkaline Waters of the London Basin: Dr. J. C. Thresh. 
MONDAY, Aprit t. 
Society OF ENGINEERS, at 7.30.—Ligno-Concrete: G. O. Case. 
Royat GEoGRAPHICAL SocIETY, at 8.30.—The Mountains of Northern 
~ Sikhim and Garhwal: A. M. Kellas. 
ARISTOTELIAN SociETy, at 8.—The Time Difficulty in Realist iiheorae 
of Perception: Dr. Wm. Brown, H. Wildon Carr, Prof. G. Dawes Hicks, 
and Prof. F. B. Jevons. 
Roya Society OF ARTS, at 8.—Materials and Methods of ‘Decorative 
Painting: Noel Heaton. 
Victoria INSTITUTE, at 4.30.—Archzology and Modern Biblical Scholar- 
ship: Rey. John Tuckwell. 
Society oF Cuemicat Inpusrry, at 8.—The Theory of Sulphuric Acid 
Manufacture : W. C. Reynolds and W. H. Taylor.—The Estimation of 
Sulphides in Lime Liquors: J. R. Blockey and ?. RB. Mehd. 
TUESDAY, Apri. 2. 
R6NTGEN Society, at 8.15.—The Physiological Principles of Internal 
Radiuin Therapy : Dr. Saubermann. 
ZOOLOGICAL Societry, at 8.30.—Lantern Exhibition of Nestling Cariama, and 
the Display of the Peacock Pheasant: D. Seth-Smith.— Ona Rare Stag 
(Cervus wallichii) from Nepal, presented tothe Society by H.M. the King: 
R. I. Pocock, F.R.S.—Contributions to the Anatomy and Systematic 
Arrangement of the Cestoidea.—IV. On Species of /nermicapsifer from 
the Hyrax and on the Genera Zschokkeella, Thysanotaenia, and 
Hyracotaenia: F. . Beddard, F.R.S.—Additional Notes on the Living 
Specimens of the Australian Lung-Vish (Cevatodus forster?) in the Collec- 
tion of the Zoological Society of London: Dr. Bashford Dean.—Prosable 
Papers: A First Account of the Courtship of the Redshank Ce 
calidris: J. S. Huxley.—Amphipoda from Bremerhaven : Mrs. E.. W.. 
Sexton.—Descriptions of New Fishes ot the Family Loricariid# in ing 
British Museum Collection: C. Tate Regan. 
InstTiTUTION oF Civic ENGINEERS, at 8.—The Works for the Supply of 
Water to the City of Birmingham from Mid-Wales: E. L. Mansergh and 
W. L. Mansergh. 
WEDNESDAY, ApRIL 3. 
Socirty or Pusiic ANALYSTS, at 8.—Note on the Milk of a Small Herd: 
E. Russell. —The Separation of Arsenic from Antimony : S. W. Collins. — 
The Estimation of Ferric Iron in Presence of Organic Matter: Dr. J. T. 
Hewitt, F.R.S., and Gladys R. Mann.—The Relation of the Kirschner 
and Polenske Values in Margarine containing Cocoanut and Palm Kerael 
Oils: E. RK. Bolton, H. UW. Richmond, and C. Revis.—A Convenient 
Apparatus for Obtaining an Average Sample of Gas, and for Regulating 
the Flow of a Gas into an Evacuated Vessel: F. S. Sinnatt. 
ENTOMOLOGICAL SOCIETY, at 8. 
CONTENTS. PAGE 
Gabriel Lippmann .. te ote Oe 
Jottings of a Sportsman- -Naturalist . a ok SE 
Hydraulics. By A.H.G.. . - eee 
A Hunterin the Upper Yukon Ranges. “By G.W.L. 83 
Handbooks on Analytical ere By CUS. epee 
Our Bookshelf ys ee : Et ib) =) cs 
Letters to the Editor :— 
Prof. Bergson and the Eye of Pecten.—Dr. W. id 
Dakin .. ; . - 86 
Mersenne’s Numbers.—W. W. Rouse Ball... 86 
The Electrolytic Transportation of the Active Deposit 
of Actinium through Pure Water.— Prof. Tadeusz 
Godlewski . . 86 
Autophanous Eyes. —Charlotte I. Wheeler ‘Cuffe ; 
Heider S:-P. toy SE Cirote SI 
Rand Geology. By F.H.H. . ache SOR 
Western Culture in Ancient Cathay. (/iustrated.) 
By Lieut.-Col. L. A. Waddell, C:By. . . . 2 2 28s 
Notes" o7- 6 i Cons | CE 
Our Astronomical ‘Column : 
Astronomical Occurrences oe Aprile. Oe 
The Eclipse of April17 ... . a ot 803% 
iNovaGeniinoriin INO: 25.) <peeeesmemnen nine os 1 oy (On 
Analyses of Stone Meteorites. . . . f My. ey 
Observations of Nove. . ee: ee 
Life in the Ocean., Ly Dr. Ww. yt Dakin): :. ke Oe: 
University Reform in New Zealand . . 95. 
Experimental Error in Agricultural Investigations O7 
Copper and its Alioys in Early Times.  (///estvated.) 
By Prof. William Gowland, F.R.S. . c 2 os 
University and Educational Intelligence : Ree, Lor 
Societies/and A'cademies! 7/5 ueir ren 103 
BockstRecenved crt 2) eee 105 
Diary of Societies... . iva . . 106 
