474 
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DIARY OF SOCIETIES. 
THURSDAY, Jvty 2. 
Royat GEOGRAPHICAL SOCIETY, at 5.—Lithological Map of the British 
Isles: Alan G. Ogilvie. s 
FRIDAY, Jury 3. 
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Evans. > 
CONTENTS. PAGE 
Oxicin! of Igneous ~ROCKS ee ere ern unsere TL 
Introductions to Natural/Science > 5. . 2) 137 ago 
Chemistry of Plants. By S.B2S2 0) 29...) oe) 
Our Bookshelf 2c oe anaes 1 yet ee an 
Letters to the Editor :-— 
The Principle of Relativity.—A. A. Robb; E.C.. . 454 
Distribution of Rainfall on Sunday, Junet4 ... . 454 
The Photo-electric Effect of Carbon as Influenced by 
its Absorbed Gases.—O. Stuhlmann, R. Piersol. 454 
Maya Art. (///ustrated.) By H.G. . . 454 
Birds and Weather. ByA. Landeboronen ‘Thomsen 457 
Metrological Researches . . : . 458 
A Great Telescope for Canada ipy ‘Prof C. 7 
nanb) 3. 2 ep. 2 Sh oieres eae ae are 
Notes). .: ene) Rete Sk Ciuc isin cen oe 
Our Betrononicals Column: — 
Astronomical Occurrences for July. <4 Scl ” tees eee en 
The Radiation of the Sun era ts 464 
Displacement of the Lines towards the V colele in the 
Solar:Spectrum; <4 gece ba eee nae ee 
Meteors on June 25-26 . . -2b,) 404 
Z 
Report of the U.S. Naval Ghanaian Kat fore ote) GO 
Trade and Technical Education in France and 
Germany. By J. Hi ReynoldSi 214) scales 
Marine Biology in the) Dropics js ee 465 
Termites and their Habits Si gee eta att 466 
The Australasian Antarctic Expedition, 1911 ve 
By Sir Douglas Mawson . . Ais Sa ee 
University and Educational [ntelieence”: 5 SAO 
Societiesiand Academies) =. 4). nee ee ea 471 
Books Received . ere, names 5 0.7/3! 
Diary of Societies . Jog ey ee Aga: 
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