4So 



NA TURE 



[March 19, 1903 



copal varnish, the author has been able to determine the 

 modulus of rigidity in this liquid, o'i2 absolute unit at 

 22°'2 C. It is interesting to note that this figure is of the 

 same order of magnitude as the value found by M. Schwedoff 

 for the modulus of rigidity of a half per cent, solution of 

 gelatine, by an entirely different method. — New magnetic 

 systems for the study of very feeble fields, by MM. V. 

 Cremieu and H. Pender. The disadvantages attending 

 the use of astatic systems for the exploration of very weak 

 magnetic fields are fully discussed, and a new arrangement 

 is proposed consisting of a horizontal arm suspended at its 

 centre by a long wire, and carrying at one end a vertical 

 magnet and at the other a non-magnetic counterpoise. It 

 is claimed for this arrangement that it is extremely sensi- 

 tive, easily regulated, and capable of being rendered per- 

 fectly astatic. — On electric convection, by M. Vasilesco- 

 Karpen, Experiments are described by the author which 

 appear to prove beyond question the reality of the existence 

 of the Rowland effect. — A method of stereoscopic radioscopy, 

 by M. Th. Guilloz. It is shown that the use of two sources 

 of the X-rays is unnecessary for stereoscopic radioscopy, and 

 that the same effects can be practically realised by the dis- 

 placement of a single tube. — On a thermostat with electrical 

 heating and regulation, by MM. C. Marie and R. Marquis. 

 The expansion of acetone or other suitable liquid actuates 

 a relay, by which the heating current is governed. The bath 

 can be kept at any desired temperature within two or three 

 hundredths of a degree. — On cuprous sulphate, by M. A. 

 Joannis. The author has succeeded in isolating and 

 analysing the compound of cuprous sulphate and carbon 

 monoxide the existence of which was indicated in a previous 

 note. Its composition is Cu,SO,,2CO,H,0 ; the carbon 

 monoxide is given off in a vacuum, the residual cuprous 

 sulphate decomposing into copper anu cupric sulphate, 

 although there are indications that the cuprous sulphate 

 can exist undecomposed in the presence of ammonia. — On 

 some derivatives of oxynaphthoic acid, by M. F. Bodroux. 

 — On the nervous system of the Nautilus, by M. Ch. 

 Gravier. — On a new mode of constitution of the chain in 

 a new Salpa from the Persian Gulf, by MM. Jules Bonnier 

 and Charles Perez. A new subgenus is proposed, Stephano- 

 salpa, and the new species collected at Kumzar is described 

 under the name of Stcplianosalpa polysona. — On the in- 

 fluence of the subject on the graft, by M. Leclerc du Sablon. 

 The results of a series of experiments on the grafting of 

 different varieties of pears. — On the development of Cicer 

 arietinum after section of the embryo, by M. P. Ledoux. — 

 On the new genus Protascus, by M. P. A. Dangoard. — 

 The formation of antherozoids in Marchantia polymorpha, 

 by M. S. Ikeno. — On the existence of several successive 

 orogenic movements in the Northern Urals, by MM. L. 

 Duparc, L. M razee and F. Pearce. — On the oxydases 

 of cuttle fishes, by M. C. Gessard. A study of the ink- 

 producing gland of the cuttle fish shows that, as is the case 

 in plants, the tyrosinase is always accompanied uy a 

 laccase. — On the presence of an erepsin in some Basidio- 

 mycetes, by MM. C. Delezenne and H. Mouton. — On the 

 dust deposits of February 22, 1903, by M. F. A. Forel. 



DIARY OF SOCIETIES. 



THURSDAY, March 19. 

 Royal Society, at 4.30.— On the Formation of Barrier Reefs and 

 of the Different Types of Atolls : Prof. A. Aeassiz, For. Mem. R.S. 

 — On Central American Earthquakes particularly the Earthquake of 

 1838: Admiral Sir John Dahymple Hay, Bart, F.R.S.— The Emana- 

 tions of Radium : Sir William Crookes, F. R S 

 Linnean Society, at 8.— On Pan laxa and Poo. stricia, of our British 

 Floras: G. Claridge Druce.— The Botany of the Ceylon Patanas. Part 

 II. Anatomy of the Leaves : John Parkin and H. H. W. Pearson. 

 FRIDAY, March 20 

 Royal Institution, at 9 —The Paths of Volition : Prof. E. A. Schafer, 



F.R.S. 

 Epidemiological Society, at 8.30 —The Prevention of Diphtheria Out- 



bieaks in Hospitals for Children : Dr. Louis Parkes. 

 .Institution of Mechanical Engineers, at tJ. — A Premium System 

 .applied to Engineering Workshops : James Rowan. 

 SATURDAY, March 21. 

 Royal Institution, at 3.— Light : Its Origin and Nature : Lord 

 Rayleigh. 



MONDAY, March 23. 

 Society of Arts, at S.— Hertzian Wave Telegraphy in Theory and 

 Practice: Prof. J. A. Fleming, F.R.S. 



TUESDA Y March 24. 

 Royal Institution, at 5.— Great Problems in Astronomy: Sir Robert 

 Ball, F.R.S. 



NO. 1742, VOL. 67] 



Institution of Civil Engineers, at 8. — The Protection Wi rks of the 

 Kaiser-i-Hind Bridge over the River Sutlei, near Ferozcpur : A. 

 Morse 

 Mineralogical Society, at 8.— On the Diathermancy of Antimonite : Dr. 

 A. Hutchinson.— A Peculiar Form of Magnetite in Hunter Sandstone : J.B. 

 Scrivenor.— (1) A Large Crystal of a ->ulpharsenite ot Lead from the 

 Binnenthal; (2) A Twin of Copper Pyrites : Prof. Lewis.— A New Sulph- 

 arsenite of Lead from the Binnenthal: k. H.Solly. 

 WEDNESDAY, March 25. 



Society of Arts, at 8.— Oil Light by Incandescence : Arthur K itson. 



Geological Society at 8. -(11 On a New Species of Solenopsis Irom the 

 Pendle>ide Se> ies of Hodder Place, Stonyhurst ; (2) Note on Some 

 Dictyonema-like Organisms from the Pendleside Series of- Pendle Hill 

 and Poolvash : Dr. Wheelton Hind. — The Geology of the Tintagel and 

 Davidstow District (Northern Cornwall): John Parkinson. 

 THURSDAY, March 26. 



Royal Society, at 4.30. — Probablt Papers —Some Physical Properties of 

 Nickel Carbon\l. T Prof. J. Dewar, F.R.S., and H. O. Jones —The 

 Electrical Conductivityimparted to a Vacuum by Hot conductors : O. W. 

 Richardson — An Attempt to Estimate the kelative Amou"ts of Krypton 

 and of Xenon in Almosprieric Air : Sir William Ramsay, K.l .B., F.K S. 

 — On a New Series of Lines in the Spectrum 01 Magnesium : A. Fowler. 

 — An Inquiry into the Variation of Angles Observed in Crystals, 

 especially of Potassium-Alum and Ammonium-Alum : Prof. H. A Miers, 

 F. K.S — On the Depend- nee of the Refractive Index of Gases on 

 Temperature: G. W. Walker. — On the Evolution of the Proboscidea : 

 Dr. C. W. Andrews. 



FR/DA) March 27. 



Royal I nstitution, at 9.— The Pearl Fisheries of Ceylon : Prof. W. A. 

 Herdman, F.R.S. 



Institution of Civil Engineers, at 8.— The Advantages of Motor 

 Driven Printing Machines : J. G. Y. D. Morgan. 



CONTENTS. page 



A Dutch Prime Minister on Economics By R. G. 457 



Purification and Disposal of Sewage. By G. M. . . 457 



Another Text book of Zoology. 459 



Out Book Shell 



Wright : " The Analysis of Oils and Allied Sub- 

 stances" ... ... . . 460 



" Opere di Galileo Ferraris "... . . 460 



Comstock : " A Text-book of Field Astronomy for 



Engineers" . . . ... 460 



Reich : " A New Student's Alias of English History " 461 



Groves: "The Rational Memory" 461 



Holden : " Real Things in Nature " . 461 



Thomas: " Castology : a View of the Oolite Period 



and Earliest Man "... 461 



De Crespigny and Hutchinson : " The New Forest " 461 

 Letters 10 tn b-dtt 1 : 



Effects of the Gale of February 26. — Loid Rosse, 



F.R.S. . . . 462 



Ambidexterity. — Sir Samuel Wi ks, Bart., F.R.S. 462 

 Mendel's Principles of Heiedity in Mice. — W. 



B.«teson, F R. S. . 462 

 University Education in the United Kingdom and 



Germany. — Prof. J. Wertheimer . . . 463 



Hygrometric Determinations — E. V. Windsor . 463 



Lagrange's Equations. — A. B. B ss< t. F.R.S. . 464 



A Remarkable Meteor. —J. E. C. Liddle . 464 



Dawn of Modern Geograph). — C. Raymond 



Beazey ... . . 464 



Nemst Limps in Lanterns. — C Turnbull . . . 464 

 Photographs of Volcanic Phenomena. (Illus- 

 trated. ) By J. W. J. . . 464 

 The Aftermath of the Paris Exhibition. B) Dr. F. 



Mollwo Perkin . . .... 465 



Remarkable Winters. Bv Chas. Harding . . 466 



A Unique Variable Star. B) Dr. William J. S.Lockyer 467 



Notes ... . 468 



Our astronomical Column : — 



New Spectroscopic Binaries . . . . • ... 472 



The Spectrum ol Comet 1902 b .... . 472 



Missing Asteroids ... . 472 



A Ri h Nebulous Region in the Constellation Lvnx 472 



The Birds of B mpton Cliffs. (Illustrated.) By R. L. 472 



A New Binocular (Must, aled.) . . . . 473 



Seismological Notes . . 473 

 The New Biological Station at Port Erin. (Illus- 

 trated.) ... . . 474 



Botanical Notes . 475 



I he Prevention of Dew Deposits on Lantern 



Slides. By Prof. Arthur Schuster, F.R.S. 476 



University and «.du. ational Intelligen. e 476 



Scientific Serials 477 



Societies and Academies .... . . 477 



Diary of Societies 480 



