. On the Viscosity of Colloidal Iron Hydrate. By A. D. Drnnine, M.Sc., 
Fh-D. 
CONTENTS. Xili 
Page 
476 
cece eee cece ec ccc ees beeeeneeeeeeees sess eesececssesvenceseseceeesversesoscncccoccecce 
5. Magnetic Double Refraction of Colloidal Iron Hydrate. By A. D. Drn- 
NING, M.Se., P.D. s.cavescccsssescecceeeseceessseeeeecnsecceaeaceseeessecenenens ones 477 
6. An Experimental Verification of Newton’s Second Law. By W. D. 
FEGGAR, M.A. .....cceescseseesesneaeeceeesecenecesseeseeseesenseneensenesscaresecraeases 478 
7, On a Modification of FitzGerald’s Model of the Ether. By J. BurLER 
BURIE . . 5o00 00h foo osk ecRistelece tins dave «nd st pstaeetmcivsaaree’- esp a obieliew vince qaep iritsuinns 478 
8, *On the Electric and Thermic Conductivities of certain Alloys of Iron. 
By Professor W. F. Barrett, F.R.S., and R. A. HADFIELD ...........0006 479 
9, On a New Apparatus for producing Magnetic Fields of Force. By Pro- 
fessor MARCUS HARTOG ....ccccecencececeecececeeeeeesenenseeesensareseneeeesseees 479 
Sus-sEcTION oF ASTRONOMY AND CosmicaL PHysIcs. 
1. Report on the Magnetic Observations at Falmouth Observatory (p. 29) ... 479 
2. Report on Meteorological Observations on Ben Nevis (p. 55) ......seeeeeeee 479 
3. Some Results with the Solar Physics Observatory Photo-Spectro-Helio- 
graph. By Witt1am J.S Lockyer, M.A., 2300) Dip el dl iva \s heap eondoncaoee 480 
4, On the Unsymmetrical Distribution of Rainfall about the Path of a 
Barometric Depression. By Huew Roper MILL, D.Sc. .......000-0.-- 480 
5. The Application to Meteorology of the Theory of Correlation. By Miss 
BB, CAVE......ccccceccsccscnscascnecscceccecssecscsunasestacessccocscsssseesenscssians 4 
6. The Development of the Aeroplane. By Major B. BaDEN-PoWELL ...... 481 
7. *Plato’s Theory of the Planets. By Professor D'Arcy W.THomPson, C.B. 482 
8, Report on Underground Temperature (p. 51) ......---ssseseeeeeeeeeeeseeaneneees 482 
9. *Zur Flugfrage. By Dr. F. HIRTEL .......eeeeeeeeeeeeeesneeeseeessneeeeeeeenn es 482 
10. Upper Air-currents and their Relation to the Audibility of Sound. By 
Rev. J. M. BACON .cc.....cee ceeceseeceecsseceseeecsesenceceeseceecsaeeacassseeaerses 482 
11. On the Effect of Electric Air-currents. By Professor Serr Lemstrom 482 
Address by Professor Sypney Youne, D.Sc., F.R.S., President of the 
1 
2b 
. The Rainfall of the Midland and Eastern Counties of England. By Jon 
485 
Horxtnson, Vice-Pres.R.Met.Soc., Assoc.Inst.C.B...........:sseeeeeeeeeeeees 
. The Rainfall of England, 1861-1900. By Jonw Horxinson, Vice-Pres. 
R.Met.Soc., Assoc.Inst.O.E.  ...ccccsseccesecseeneesenseceaersensnescsensersnecsons 485 
Section B.— CHEMISTRY. 
THURSDAY, AUGUST 18. 
SSC EIN ee a TA carte diciale Jee sldine sele's ovals oe'siislejsiueie 488 
The Relation between the Crystalline and the Amorphous States as dis- 
closed by the Surface Flow of Solids. By G. T. BEILBY  .........:-+0000+ 499 
The Action of certain Gases on Glass in the Neighbourhood of Hot Metals. 
By Gal D. BREED Y 1.550. 08 oee es cence ne eeanceo ase cecsasstlanneecnbueseeddeadsseonsees 500 
. *On the Formation of Salts in Solutions, Sepueteaity amongst Tautomeric 
Compounds. By Professor J. W. BRUHL ..........:eeeeeeeeeseeseeeseressecsees 500 
. *Methods of Investigating Alloys, illustrated from the Copper-Tin Series. Sa 
By C. T. Heycocx, F.R.S., and F. H. NEVILLE, MERON: Gabe s »s cmetasion> hich 
