xiv 
CONTENTS, 
DEPARTMENT OF CosMICAL Puysics. 
Page 
. *Seasonal and Storm Vertical Temperature Gradients. By 
IP TOLESSOL Wet. EL UMPHRUVS |... +. «0. ts0dgsat yes scopes ceteeet cee aeaee te eee 412 
. Report on the Present State of our Knowledge of the Upper 
LOS ROP OCD, 2) tstrennesrsrss ter: sivaretasstesstues.veaedsae seuss 120 5s5saeane 412 
WEDNESDAY, SEPTEMBER 1. 
DEPARTMENT OF GENERAL PHYSICS. 
1. The Effect of Temperature Variations on the Luminous Discharge 
in Gases for Low Pressures. By Roperr F. HaRHART............... 412 
2. *Diffraction of Electric Waves. By Professor H. M. Macponazp, 
HE SEUS Sater seeeas ence nee EPMO ot st sie en cauics ode van dnsaecGraeetawe seotca eae eemeae 412 
3. *The Instantaneous Propagation of a Disturbance in a Dispersive 
; Medi steby 2D iso Mme SEPA VREOCK....scc.0cesccenqacaatecstems sesamiae sees 413 
4. The Relative Motion of the Earth and Ather and the FitzGerald- 
Lorentz Mifect. By C. W. CHAMBERLAIN ...............s:ccnseconseonssee 413 
5. *On some New Methods under Trial for Tables of the Moon’s Motion. 
ye ercscor H.W) ROWAN, Uke «zeros. .s0ceaneacnosaseccspdesadarery 413 
6. A Cemented Triple for Spectroscopic Use. By Lieut.-Colonel J. W. 
“OD a eee Wey tac eS bg Rg Pe ae eer Fo RE 413 
7. On Magnetostriction. By H. G. Dorsty, Ph.D. .........0....00.000000- 414 
8. The Photographic Registration of Sound Waves. By Professor 
DRAVTONAC “MULLER DESO ces lsneceeion. ka neenbha anak aiutiesneee aimee 414 
DEPARTMENT OF CosMmicAL Puysics. 
. The Highest Meteorological Observations in America. By Professor 
ACT IGANWREN CH PIROMCHS sheet acs cath eee tenet con peed eee ee 415 
. *The Thermal Structure of the Atmosphere over the British Isles, 
July 27-29, 1908. By Dr. W. N. Suaw, F-.R.S. ..........0sccsseenscees 415 
5. Results of Twenty-five Registering Balloon Ascents from Manchester 
during the period June 2, 7 p.m., to June 3, 7 p.m., 1909. By 
Wi gAS TAB WOOD, AMESGN yi fiche cunct Mt Sisco ccatast one use beeeceeousehek saa 415 
4. *A Balloon Spectrograph. By Professor W. J. HumMpuHreys ......... 417 
. The Effect of Atmospheric Pressure upon the Earth’s Surface. By 
B. Naprer Denson, PiR.Met:Soes 0.6. .c.cicccceteleticesscceesecwens 417 
Section B.—CHEMISTRY. 
THURSDAY, AUGUST 26. 
Address by Professor H. E. Armsrrone, Ph.D., LL.D., F.R.S., 
President of the Section ...:..... es ececcsoee peti Lhe 420 
