Vili CONTENTS. 
AcoustTIcs. 
Mr. W. FrercHer Barrett ona simple method of exhibiting the Combi- 
nation of Rectangular Vibrations ...... Be siatetetele the Adasados ai Joo aor 
Haat. 
Mr. W. FLETcHER Barrett on Sources of Error in determinations of the Ab- 
BOPP MOMIOL Vea D Dyp MAGUS occcie let el\« «) oVensn, «/e¥eVe! ole 0) oho chtotey stotelee anette feria 
Mr. FreDERICK GUTHRIE on the Thermal Resistance of Liquids .......... 
Licur. 
Mr. A. R. Carton on certain facts bearing on the Theory of Double Refraction 
Mr. Loma Bive.on Actinometry:. iy)! ig sisle/fe dag. 94 aes ye ole 
Mr. GrorGE GLADsTONE’s observations on the Atmospheric Lines of the Solar 
Specirum aibagh Latitndes ...3... .tife/owslae sys + wedewulten ss aiceale Demis 
Dr. J. H. Guapstone on the value of the Hollow Wedge in examining Ab- 
EASE GREOD SID GCUL Ss os.s pws 0010510 » wie sie a ninis Misvala'sie 01s nm, ie atsiale ae ee eee 
Professor MorREN sur une action particuliére de la lumiére sur les sels d’argent 
Eecrriciry, MAGNETISM. 
Mr. W. Lapp on a further development of the Dynamo-Magneto-Electric 
BMICHITIO OT secre sttierc nthe ierecee ais ciMtaie eieie sfeleihe vl ou ayeneein clues ae Eee eee 
Mr. C. W. Stemens on the Electric Conductivity of Platinum as affected by 
EG PEMOCERS OL (DIMMU TACIELD Ys sc 5 x «stip als,0 5 \e'ay0.6°4°9)5,0)o,> mie «0 1n.0rm ple ene ee 
Hon. J. W. Srrurr on a permanent deflection of the Galvanometer-needle by 
a rapid series of equal and opposite Induced Currents ..........-...000 
Mr. F. H. Vartery on the construction of a Galvanometer for the Detection of 
Wweakrblecic OUITONt ts. csces eet ces eccn ce cont: SAR cine rere ae 
Professor C, ZENGER on a new Automatic Telegraphic Apparatus .....+.+++ 
MeEtTEoROLOGY. 
Mr. Ropert James Mann onthe Resemblance and Contrasts of the Climates 
Obie Ma TrEVGTAB ANG INGE. coc. ccc occs< wssre eis e's ein «ers > Corereeielatelotnn atte 
Dr. Mann’s abstract of Meteorological Observations made at Pietermaritz- 
burg; Natal < PARTE See aoe eee Ae SY ee oh ee 
Mr. CHARLES Meitprum on Synoptic Weather-Charts of the Indian Ocean. . 
on Storm-Warnings in Mauritius..............6. 
Padre Srccur on some Meteorological Results obtained in the Observatory 
SGMELOMG ~ <7. .)e's tn a's “a vate toes toe etch fs seen ee eeeeeteesereveceens 
CHEMISTRY. 
Address by Professor E. Frankianp, F.R.S., President of the Section...... 
Mr. F. A. Apex on the Chemical Composition of the Great Cannon of Mu- 
hammed II., recently presented by the Sultan Abdul Aziz Khan to the 
British Government’ 71.0200. pecs Cog os 6s Se rinitao Gicsia 
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