#11 CONTENTS. 
Page 
8. Imaginary Geometry of the Conic. By Professor Ettery W. Davis, 
PAD sc likens ace tanneeh chee eaeeeon ane nataeeaee ete Seese erase tne as eames 391 
9, On the Invention of the Slide Rule. By Professor FLor1an Casori... 391 
10. The Asymptotic Expansions of Legendre Functions. By J. W. 
NicHOLSON;  MVAM TD Scie, cicncaten seid aes twas cals sbecvetechenetmaoc asters 391 
dS Reportqn Bessel unerions iG. GO) eae. ocsoccdsdseyns.sscasmewenrecemesnenmueee 394 
DrEPARTMENT OF GENERAL Puysics. 
1. On Threefold Emission-Spectra of Solid Aromatic Compounds. By 
Protessor- Ht GOLDSTBEN (ID: 129), S.eccyspvees cei cc.sseuuhiens stebens abeeneeeee 394 
2. The Influence of Electrolytes on Colloidal Ferric Oxide Solutions. 
SARE A es OO LON MEME ee eye nee eee mee ceciiscss sis» -Waaghienece re coeeah ete tele mer 594 
3. Separation of New Radio-active Disintegration Products. By Dr. 
OTT OMEUMTEN serie hite palsies glo Mes aoe ty tee tea De Sond as dalaleeannwsnw apsiapiedayaeeeemeee 594 
4. On the Secondary Rays excited in different Metals by Alpha Rays. 
Bycbrotessor ds (Cgc WrinNAN ong ronspetcrsnstsass- ees aenhawcedchananesmeinas 395 
5. On some Phenomena associated with the Radiations from Polonium. 
ESS Viet HRS OUIND ANTM AL. ctv ciaceoteeees aman wok en ite. 0S Paae ne Sec aaee meee 396 
6. Anode Rays and their Spectra. By Dr. Orro Re1rcHEennerm (p. 124) 396 
7. On Clark and Weston Standard Cells. By H. L. Bronson, Ph.D., 
UTI PACING RS EUA Wats cary etecr ete ceeceatnrs tetnarer saasecacvimrentmese sas eo enous 396 
8. *On the Action of Alpha Rays upon Glass. By Professor E. 
Ges TESTE NGDTETY, TAL ERCES OT ics ca pasa « Sev tug Rgedag ns isaen ay pip cotense eae, 398 
DeparRTMENT oF Cosmicat Puysics. 
1. Results of some Recent Terrestrial Magnetic Work. By Dr. L. A. 
PGRURIINE 2 ahs -arnicgacieehe acs Ita eet bbb bees dike’ de sisesimeesulespeaineeah denn ds Roamer 398 
2. The Surface Movement of Air in certain Circular Storms. By J. I. 
(RIAN G RIVE AG SHE us cE gs stat cuscesercpaienietdetaawseaecset toecvauteeteies Aenean 399 
5. *The Distribution of Atmospheric Pressure in Canada. By R. F. 
RS TU AURUT ss oer, meee cers er SGemEtice oan etee Moat Sane ceaescusaoane te ENE eee ee 400 
4. On the Size of Hailstones observed during a Storm in Western 
Canada: iBy (J: W.iSurpnay, IBA. \.Jo.a<,-sasseecsackunds degen 400 
5. Some Results of Stellar Parallax Investigations made at the Radcliffe 
Observatory, Oxford. By Dr. A. A. Rampavt, F.R.S. .........000006 400 
6. *Two curiously similar Spectroscopic Binaries. By J. 8S. PrasKerr 
aad VWs: Bh EDA ese vl; Lav siaCahasess Pi sasesh- bus tip Saaceaberp hdl 401 
MONDAY, AUGUST 30. 
*Discussion on Positive Electricity. Opened by Professor Sir J. J. 
THOMSON, . HURSSA a. ccscatntas een ee Re ee oo ee eee 402 
1. The Law of Distribution of Stellar Motions. By A. 8. Epprneron, 
r OTA. MESS. <5. goadkceddl. SC cas clone ee aE oe 402 
