l^ov. 14, 1878] 



NATURE 



xiii 



DIARY OF SOCIETIES. 

 London 



THURSDAY, November 14. 

 Mathematical Society, at 8.— Anniversary.— Instability of Jets : Lord 

 Rayleigh, F. R. S.— Self-strained Frames of Six Joints: Prof. M. W. 

 Crofton, F.R.S. 



SUNDAY, November 17. 

 Sunday Lecture Society, at 4.— The Philosophy of Heraclitus: Dr. C. J. 

 Grece. 



TUESDAY, November 19. 

 Zoological Society, at 8. 30.- -On the Relative Positions to their Con- 

 struction of the Chambered Shells of Cephalcpods: Prof. Owen, C.B_. — 

 On the Classification of the Cervidoe, with a Synoptical List of the Exist- 

 ing Species: Sir Victor Brooke, Bart.— On a New Species of Gazelle : Sir 

 V. Brooke, Bart. 

 Statistical Society, at 7.45. — Opening Address. 



WEDNESDAY, November 20. 



Geological Society, at 8. — Oa the Upper Greensand Coral Fauna of 



Si Haldon, Devonshire: Prof. P M, Duncan, M.B., F.R.S.— Notes on 

 PUnrodus affinis, sp. ined. Agassiz, and Description of the Spine pf 

 Cestraciont from the Lower Coal Measures : J. W. Da\TS. — On the Dis- 

 tribution of Boulders by other Agencies than that of Icebergs : C. E. 

 Austen. 



Meteorological Society, at 7. 



Society of Arts, at 8. — Opening Meeting. 



Crovdon Microscopical Club, at 8. 



THURSDAY, November 21. 



Royal Society, at 8.30. 



Chemical Society, at 8. — The Processes and their Comparative Value for 

 Determining the Quantity of Organic Matter in Potable Waters : Dr. C. 

 M. Tidy.— A Chemical Study of Vegetable Albinism : Prof. A. H. Church. 

 — Researches on the Acticn of the Copper-Zinc Couple on Organic Com- 

 p jimds : Dr. Gladstone and Mr. Tribe. — On a New Gravimetric Method 

 for the Estimation of Minute Quantities of Carbon : Dr. Dupre and Dr. 

 Hake. 



LiNNEAN Society, at 8. — Preliminary Report en the MoUusca of the 

 Challenger Expedition (viz. , the Genera Dentalium, Siphodentalium, and 

 CaduUis): Rev. R. Boog Watson. — On the S>Tnplccaceae : John Miers. — 

 On Tuberous Branch Terminations in Yitis gon^y lodes : R. Irwin Lynch 



FRIDAY, November 22. 

 QimKETT Microscopical Club, at 8. 



SATURDAY, November 23. 

 Physical Society, at 3. 



SUBSCRIPTIONS TO NATURE 



Subscribers are asked to note that the subscriptions 

 to Nature are as folloTS"s : — 



Yearly 28J. 



Half-yearly 14J. 6</. 



Quarterly js. dd. 



To the Colonies, United States, the Continent, and 

 all places -within the Postal Union : — 



Yearly 30^- ^^• 



Half-yearly x^s. (>d. 



Quarterly 8.?. 



Office : 29, Bedford Street, Strand. 



S. 0. TlSLEYd^Co., 



172, 



OPTICIANS, 

 BROMPTON ROAD, S.W. 



(Close to South Kensington Museom). 



THE PHONEIDOSCOPE. 



An Instniment for Observing the Colour-Figures_ of Liquid Films under th« 



action of Sonorous Vibrations. 

 B«ing a visible demonstration of the Vibratory and Molecular Motion of a 

 Telephone Plate. 

 The PHONEIDOSCOPE, with 3 Discs, Bottle of Solution, Descriptive 

 Pamphlet, &c., in (ird'x)^d Box, lor. (>d. 



manufactured and sold wholesale and retail bt 

 S. C. TISLEY & CO., 172, BROMPTON ROAD, LONDON, S.W. 

 TELEPHONIC ELECTRICITY. All Materials supplied for experi- 

 mental purposes 

 Price Lists of Electrical and Acoustic Apparatus, •with Dratvings atul 

 Description of t)u H armmozraph. Post Free, 2d, 



JAMES WOOL1.EY, SONS, & CO., 



69, MARKET STREET, MANCHESTER. 



CHEMICAL APPARATUS AND REAGENTS 



For Lecture and Class Demonstration, Laboratory Instruction, &c. 



SETS OF APPARATUS AND CHEMICALS 



For the various Public E.xaminatiocs. 



Portable Ckanicnl Cab: nets adapted for private study. 



Price li^ts on Application. 



LIGHTNING CONDUCTORS. 



Experience, accumulated since the time of Benjamin Franklin, prores 

 conclusively that a Conductor made of Copper of adequate size is thi btst 

 of all appliances for the protection of every description of baildins fiom the 

 destructive effects of lightning. 



NEWALL & CO.'S 



PATENT COPPER LIGHTNING CONDUCTOR, 



As applied to all kinds of Buildings and Shipping in all parts of the world 

 with unvarying success, is the most Reliable, most Effective, and Cheapest 

 Conductor ever offered to the pubhc. 



It is simple in its application, no insulators being required, and it costs 

 only one smiling per foot for the standard size, which is safe in any stcrm 

 R. 8. NEW^AIiIi A CO.: 130, STRAND, W.C 



36, WATERLOO ROAD, LIVERPOOI* 

 63, ANDERSTON QUAY, GLASGOW. 

 MANX7PACTORY— GATESHEAD-ON-TYN^ 



EUDOLPH 



KOE-MG, 



(DR. PHIL.) 

 MANUFACTURER OF 



ACOUSTICAL INSTRUMENTS. 



TO ILLUSTRATE THE LAWS 



AND TO PRODUCE THE PPIENOMENA OF SOUND, 



PARIS, 26, RUE-DE PONTOISE. 



PRICE LISTS FREE. 



EDWARD PATERSON, 



Electrical Ettgtnecr and Scie7itific Apparatus Manufacturer, 

 3, BEDFORD COURT, COVENT GARDEN, LONDON. 



APPARATUS FOR CLASS DEMON- 

 STRATION and fcr SCIENCE SCHOOLS. 



ELECTRIC LIGHT APPARATUS. 

 SIEMEN'S DYNAMO MACHINE for 



HL-e. 



LARGE ASSORTMENT of RUHMKORFF 



COILS and V.\CUUM TUBES. 



PROFESSOR HUGHES' MICROPHONE. 

 COOKE'S TELEPHONE ALARUM. 

 ELECTRIC BELLS and INDICATORS. 

 TELEPHONES and TELEPHONE CALL 



BELLS, WIRE, &c., for Fixing. 



ELECTRO -METALLURGICAL CABI- 



NETS, from;f4tO;^i2. 



PROF. S. P. THOMSON'S LANTERN 



SLIDE GALVANOMETER, 20J. 



EDISON'S ELECTRIC PEN £8 8s. 

 ELECTRIC and MAGNETIC APPA- 



RATUS of all Descriptions. 

 New Illustrated Catalogue of do pages post free 6 stamps. 

 Orders over £,1 carriage paid to any part of the United Ringilom. 



MICROSCOPES, OBJECTIVES, &c, 



CENTENNIAL EXHIBITION. PHILADELPHIA, U.S.A. 



The Medal and Highest Award has been given for Design, 

 Construction, Optical Excellence, and Moderation in Price, to 



HENRY CROUCH, 



td, BARBICAN, LONDON, E.G. 



Fully Illustrated Catalogue and ftill Instructions by Post, 6 Stamps. 

 Mailed abroad free. 



THE MINIATURE MICROSCOPE LAMP 



(REGISTERED) 

 PRICE 14*. PORTABLE TIN CASE FOR DITTO, w. &i. 



JAMES HOW & Co., 



SCIENTIFIC INSTRUMENT MAKERS, 



5, ST. BRIDE ST. {late 2, Foster Lane\ LONDON. 



