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CONTENTS. xl 
Page 
3. “Criteria of Stellar Temperatures. By H. F. Newatt, F.R.S. 0.0.0.0... 459 
4, The Short-period Barometric See-saw and its Relation to Rainfall. By 
Wiriam J. S. Looxyrn, M.A;;-Ph.D:, F.RvAcSicossiscassccecssacyaccteesss 459 
5. “The Relation between Solar Physics and Meteorology. By Professor 
LL UUTACL ATT SSSRe Gy apr Se oe nee ee en 460 
6. “Experiments with Kites in the Mediterranean. By L. TrrsspRENC DE 
MAES a eid nal eet in fana ht Loney dda wentucagnadiogsceonatsimveiactaecee me ote 460 
7. The Relation between the Minima and following Maxima of Sun-spots, 
Peau NEES MEINE acta ssyras ss (Actas satya cian hg oaoway tase vocccaceete ee 460 
8. *Relation between Pressure, Temperature, and Air Circulation in the 
South Atlantic Ocean. By Commander C. HEPWORTH.........cs000000000 461 
9. On the Ultra-red Absorption Spectrum of Ozone and the Existence of that 
Gas in the Atmosphere. By Professor K. ANGSTROM.............0e0ee0eee0e 461 
10. An Instrument for the Measurement of the Radiation from the Earth. 
Prva eoteenan IC, ANGIE DMs «.0-pe. seh oshpmaen<aeJancoedtabueasdex ctite da at 462 
DEPARTMENT OF MATHEMATICS. 
1. The Law of Error. By Professor F. Y. Eperwortu, D.C.L................ 463 
2. Report on the Theory of Point-groups. Part IV. (p. 20). By Frances 
NANOS BEE re ch opened. ax hh «acadins yea tes teks ands ber sha stomceee dicate 463 
3. Notes on Plane Curves. By Haronp Hinton, M.A......ccccccccscsssseeeeeens 463 
4, *Note on a Special Homographic ‘Iransformation of Screw Systems. By 
pier CROMER A Te) DDD) EIR, Se, aieuadt cue sobaccncasb bu chnacamibus ddeiedds ax 464 
5. *The Theory of Vibrations. By Professor V. VOLTERRA .........-..00.e00005 464 
6. *The Stability of the Steady Motion of a Viscous Fluid. By Professor 
AV VME CED SOs ot raseeddeclcd Sosede sce ees eee eT es 464 
7. *Note on the Schwarzian Derivative. By Professor A. C. Dixon, F.R.S. 464 
BPM E Sede ded ocala cee S Bots nceoa hv ack Mea venchronnree ete tdadies sad isan 464 
9. “Some Observations on Linear Difference Equations, By Rev. E. W. 
BREE beh vA aee Saag Ua aelt - Leena vu pits sep socea ob Maga Mas yaasebadtaeed Ocnad 464 
10. *On the Use of Divergent Series in Astronomy. By Z.U. AHMAD ...... 464 
MONDAY, AUGUST 22. 
1. “Recent Improvements in the Diffraction Process of Colour Photography. 
A Ee oteneee be Wis SWiOOS) LOY, Met Lat eescicamieat ek oS teases 464 
2. *On ‘ Reststrahlen’ and the Optical Qualities of Metals. By Professor 
ELLE SIR a an A OEE Se Pres Re hin.) Ona eae 465 
3. On the Separation of the Finest Spectral Lines, By Dr. O. LumMEr ... 465 
4. “Recent Work at the National Physical Laboratory. By Dr. R. T. 
Committee, Habis. ont oSingner suas eit <a dtd eean th wads fa csoumovan ot sone. erie 465 
5. An Effect of Electrical Vibrations in an Optically Active Medium. By 
MPa OV. FE VORGIY «snot saacSacarhcian doepanat Meant’ clade sastinest: dsseeb youve dd 466 
6. Discussion on N-Rays. Opened by Dr. O. LUMMER .......0...cscecccceseeeeee 467 
7. tStandards of Wave Length. By Professor KAYSER ........ccceccccceeeeene 468 
