624 



NA TUBE 



April 27, 1905 



differential equation y"+AA(.v)y = o ; Max Mason.— On the 

 relation which exists between the velocily of combustion 

 of powders and the pressure : R. Liouville.— Optical 

 properties of iono-plastic iron : L. Houllevigue. — On the 

 theory and imitation of the motion of sails : A. Bazin. — 

 On the use of the centrifugal method in the analysis of 

 cocoa and chocolate : V . Bordas and M. Touplain. It is 

 necessary, to avoid some practically impossible filtrations, 

 to use an apparatus capable of nearly 2000 revolutions a 

 minute.— New method for a quick analysis of milk ; F. 

 Bordas and M. Touplain. By centrifugal means one 

 avoids much filtration as well as the protracted desiccation 

 of the casein. — \n apparatus for giving warning of the 

 presence of luminous gas and afterdamp : MM. Hanger 

 and PescheuK. — The crystalloluminescence of arsenious 

 acid : .M. Guinchant. This appears to be due to a 

 chemical phenomenon corresponding with the reversible 

 reaction 



As,03 + 6HCI^3H,0 + 2AsCr,. 



— On the emission spectrum of the high tension electric 

 arc : J. de Rowalski and P. Joye. — On a simple method 

 for the study of oscillating sparks : G. .A. Hemsalech. 

 The method depends on the fact that a current of air 

 directed on such a spark can separate out the oscillations. 

 — Apparatus and methods in the medical applications of 

 statical electricity : L. Benoist. An attempt to systematise 

 the usage based on the consideration of electric density. 

 — On the mode of formation of some monosubstituted 

 derivatives of urethane : F. Bodroux. When small 

 quantities of ethyl carbonate are dropped into an ether 

 solution of the magnesium derivative of an aromatic 

 primary amine, a lively reaction takes place. If aniline 

 be used, phenylurethane is formed. — On the mineralogical 

 analysis of arable earths : J. Dumont. The author 

 describes methods for quantitatively determining the 

 proportions of sand, mica, felspar, quartz, &c. — On 

 some Crustacea resulting from the expedition of the 

 Princess Alice : H. Coutiere. By the use of a net with 

 a large aperture a considerably more valuable collection 

 was made. — On the excitation of nerves by a minimum of 

 energy, and its application to electrodiagnosis : M. Cluzet. 

 By experiments made on the nerves of human beings, it 

 has been found through the application of a formula that 

 the duration of minimum excitation may be 0.00020 second. 

 — Physiology of the spleen : MM. Charrin and Moussu. 

 The experiments made tended to elucidate the much dis- 

 cussed question as to the functional relationship between 

 the liver and the spleen. — The action of intestinal fluid on 

 enteric secretion ; A. Frouin. Many facts seem to prove 

 that this exciting action is not due to secretin. — Researches 

 on animal lactase : II. Bierry. The experiments show 

 that lactase is not contained in the pancreatic juice of 

 suckling puppies. — On the production of alcohol and 

 acetone by muscles : F. Maigrnan. The author replies in 

 the affirmative to the question as to whether these sub- 

 stances, which are normally present in muscle tissue, arise 

 by alcoholic fermentation of glucose bv the agency of proto- 

 plasm. But while the acetone continues to be formed, the 

 alcohol is sooner or later destroved again. 



DIARY OF SOCIETIES. 



THURSDAY, April 27. 



Institution of Electrical Engineers, at S.—Ilisciissimt: Mr. B. J. 



Arnold's Address to the J-jint Meeling at St. Louis on the Problem of tin; 



Ahernate Current Motor applied to Traction.— /'n/cr: The Alternaie 



Current Series Motor : F. Greedy. 



FR/PAV, April ='. 

 EpiDEiaioLocicAL Society, at 8.30. 



MONDAV, May i. 



Royal Institution, at 5.— Annual Meeting. 



Society of Chemical Inoustrv, at 8.— (i)The Study of the Action of 

 Hydrogen Peroxide on a Photographic Plate in the Dark ; (2) On tlie 

 Influence of the Length of th- Time of Uevelopnenl on the Degree of 

 Darkening of the Photographic Plate: Prof. Chiri Otsuki. 



Victoria Institute, at 4.30.— The Influence of Physiological Discovery 

 on Thought : Dr. E. P. Frost. 



TUESDAY, U/^y 2. 



Zoological Society, at 8.30. — On LeucosoUnia contorta, Bowcrbank, 



Ascandra contorta, Haeckel, and Ascetta s/finosa, Lendenfeld : Prof 



NO. 1852, VOL. 71I 



.'^'>3 1 



E. A. Minchin.— Some Notes upon the Anatomy of the Ferret.Badgei 

 (Hfliclis penonata): F. K. Beddard, F.R.S.— Contributions to th< 

 Osteology of Birds, Part vii., Euryiffimids, with Remarks on the Sys- 

 tematic Position of the Group : W. P. Pycraft. 



Royal Institution, at 5.— The Study of Extinct Animals : Prof. L. C. 

 Miall, F.R.S. 



Society of Arts, at 4.30. — The Monumental Treatment of Bronze; J. 

 Starkie Gardner. 



WEDNESDAY, May 3. 



Entomological Society, at 8.— The St 



chodasexpiinctata, Curtis : J. A. Dell. 

 Society OF Public Analysts, at 8. 

 Society of Arts, at 8. — Recent K.\cavations 



nd Life-histcry of Psy- 

 e ; Mrs. Bui'ton-Brown. 



THURSDAY, May 4. 



Royal 



dW 



ution, at 5.-Flame : Sir James Dewar, F.R.S. 

 Chemical Society, at 8.— The Synthesis of Substances Allied 

 Adrenaline : H. D. Dakin.— IVIethylation of /-Aminobenzoic Acid by 

 Mtans of Methyl Sulphate : J. Johnston.— Some Notes on Sodium Alum : 

 J. N. Wadmore.— Camphoryi.i^-Semicarbazide : M. O. Forster and 



Rontgen Society, at 5, (i) to Medical Members only. Forty-two Cases of 

 Ureteral Calculus Diagnosis by X.Rays proved by Operation on the 

 Passage of the Calculi; (2) -it 815 p.m., to the Genera! Meeting, 

 Measurement and Technique in Therapeutic Dosage ; Dr. C. Lester 

 Leonard, Philadelphia. 



LiNNEAN Society, at 8.— CEcology ; its Present Position and Probable 

 Development ; A. G. Tansley.— The Flora of Gough Island : R. N. R. 



Civil and Mechanical Engineers' Society, at 7.30.— Annual Ge 

 Meeting. — At 8. — Card-Indexing and Filing : J. C. Osborne. 



FRIDAY, May 5. 

 119.— Problems underlying Nutrition: Prof. \ 

 SATURDAY, May 6. 

 loYAL Institution, at 3.— Moulds and Mouldiness : Prof. Mai 

 Ward, F.R.S. 



■rat 



CONTENTS. PAGE 



Three Cambridge Mathematical Works. By Prof. 



G. H. Bryan, F.R.S. . . 601 



Rein's "Japan." By Dr. Henry Dyer 603 



Making a Pasture . 604 



Sociology. By F. W. H 605 



Our Book Shelf:— 



Balfour: "First Report of the Wellcome Research 

 Laboratories at the Gordon Memorial College, 



Khaitoum."— Prof R. T. Hewlett 605 



Giindon : " Till the Sun Grows Cold " 606 



Gregory : " A Short Introduction to the Theory of 



Electrolylic Dissociation " 606 



Letters to the Editor : — 



Electromagnetics in a Moving Dielectric. — Oliver 



Heavis'ide, F.R.S 606 



The Dynamical Theory of Gases. — J. H. Jeans 607 



Growth of a Wave-group when the Group-velocity is 



Negative. — Dr. H. C. Pocklington . . . 607 



The Transposition cf Zoological Names. — Dr. R. 



Lydekker, F.R.S 608 



A liitle known Propeity of the Gyroscope. — Prof. 



William H. Pickering . . 608 



Have Chemical Compounds a Definite Ciiiical Tem- 

 peratureand Pressure of Decomposition.' — Geoffrey 



Martin 609 



Experiment on Pressure due to Wave.— Sidney 



Skinner 609 



Tantalum, {//luslraleci.) By Dr. F. Mollwo Perkin 610 



Primitive Water-Supply. (Il/iistraled.) 611 



Henry Benedict Medlicott, F.R.S. By W. T. B. . 612 



Notes 613 



Our Astronomical Column : — 



Astronomical Occurrences in May . 617 



Elements and Ephemerisfoi Comet 1905 a (Giacobini) 617 



Changes on Mars . 61S 



Pholi'giaphy of Planetary Nebulie 61S 



Radial Vclociiies of " Standard velocity Stars" 618 



Magnitude Equation in the Right Ascensions of the 



Eros Stars 618 



Memoirs on Marine Biology 618 



The Physical History of the Victoria Falls. (Illus- 



tialed ) 619 



Seismological Notes 620 



Societies and Academies 621 



Diary of Societies 624 







