EES a | 
CONTENTS. Xi 
Page: 
. Report of the Committee for co-operating with the Meteorological Society 
of the Mauritius in their proposed publication of Daily Synoptic Charts 
of the Indian Ocean from the year 1861. ......0b...c0-.--ce0--scccccccoecccoecene 917 
. Daily Synoptic Charts of the Indian Ocean. By CHar.zs MeEtpRvuM, F.R.S. 917 
. Report of the Committee appointed to co-operate with the Scottish 
Meteorological Society in making Meteorological Observations on Ben 
Moser oncogene nn anes accastess eee cnc siete ee 917 
. On the Meteorology of Ben Nevis. By ALEXANDER BUCHAN .....ccc000.-. 917 
. On some Results of Observations with kitewire-suspended Anemometers 
up to 1,300 feet above ground, or 1,800 feet above sea-level, in 1883-85. 
Ree CaM NPAT Am GTB NTD 5 260.2 Sides soe ake esvince dudacdoedsWibes Stee. close 919 
. On the Measurement of the Movements of the Ground, with reference to 
_ proposed Earthquake Observations on Ben Nevis. By Professor J. A. 
hig BS Beads one sceaccaccsaiercantécaviacat dail he 920 
- On the supposed Change of Climate in the British Isles within recent 
Reema LEQ SERA GH FAS: «5 on te suidssarsnerennonndanudteder scaceail aout 922 
. On Malvern, Queen of Inland Health Resorts, and on improved Hygro- 
metric Observations. By Professor C. Prazzt SmyrH, F.R.S.E........ 0. 922 
The Annual Rainfall of the British Islands. By ALEXANDER Bucwan ... 923 
» Remarkable Occurrence during the Thunderstorm of August 6, 1885, at 
wdbrighton, .By-J. BEDFORD ELWELL — .....<s.00ée<sdeissecesecececstecescte 924 
. On a supposed Periodicity of the Cyclones of the Indian Ocean south of 
the Equator. - By CHarLEs MELDRUM, F.R.S. ooiceeecccceecccsseseseceseceee 925 
. A new Wind Vane or Anemoscope, specially designed for the use of 
Meteorologists. By G. M. Wurppie, B.Sc., FVR.A.S...cceecccccecceceeseces. 926 
. On the Third Magnetic Survey of Scotland. By Professor T. E. Toorpn, 
Meer sed AW. RUCKa, BORG. oo. orcsccsscsscecclecnstheccosscbds dee 926 
TUESDAY, SEPTEMBER 15. 
1. Report of the Committee for considering the best means of Comparing 
and Reducing Magnetic Observations .............ceceecee0 Gi scaodadatteneeaatuet 928 
2. Report of the Committee for considering the best methods of recording 
the direct Intensity of Solar Radiation ..........c.ccscsccssseseeeseeeeeeeseccce 928 
3. On a means of obtaining constant known Temperatures. By Professor 
W. Ramsay, Ph.D., and Sypney Youne, D.Sc......cccccccccecceseeceoesescccee 928 
4, On certain facts in Thermodynamics. By Professor W. Ramsay, Ph.D., 
Reeser Varun. DG... kangen eee tee, ae ahs, 2 OAT Od Se 928 
5, Report on Optical Theories. By R. T. GiazEBRoox, M.A., F.R.S.......... 929 
6. On a Point in the Theory of Double Refraction. By R. T. Guazesroox, 
ER PE Fc 5et ccc endetsatasusunnci Sareea ee 929 
7. Exhibition of a Mechanical Model illustrating some properties of the 
Bere EGS, B. HINZGMBAED, BEG. ve cdavlecesccesscoreccccocst ccccecscccc. 930 
8. On the Constitution of the Luminiferous Ether on the Vortex Atom 
Theory. By Professor W. M. Hioxs, M.A., FURS. c.cc...ccsccccccecoceceeeee 930 
9. On an improved Apparatus for Christiansen’s Experiment. By Lord 
ee cee MO ED BS ioe pcncacs Ko iecsaciiciunso) bidecia, 930 
10, Optical Comparison of Methods for observing small Rotations. By Lord 
eee GT YO Aa TaD, BRIS. lance wa de pnciicheanmes acleadd. & bee etchant 930 
11 
- On the Accuracy of Focus necessary for sensibly perfect Definition. By 
Seber base vrematerens BDO) ED) HH Sas. cs.ckannc suet cid. suc, case df c.om fos 930 
