February, 1907.] 



KNOWLEDGE & SCIENTIFIC NEWS. 



V. 



V CONTENTS, v 



Practical Aerodynamics and the Theory of Aero- 

 planes. By Major B. Baden-Powell .. .. .. 25 



Queens College Horn .. .. .. .. .. 26 



Features of the Earth and Moon — Volcanic Forma- 

 tions (;;//'/i iiluslyations) .. .. .. .. .. 27 



The Bogoslofs and Earthquake Disturbance . ..30 



The Late Miss Agnes M. Gierke [with poidait) .. .. 31 



Photography : Pure and Applied. By Chapman Jones, 



F.I.C., F.C.S., &c 32 



Maximum of Mira Ceti. Hy P. M. Ryves (with diagram) 33 

 The Bride-Stones — Cleveland Hills. By E. J. Sumner, 



B.Sc. (with illiistialioii) .. .. 34 



A Fish Out of Water. By Fellx Oswald, D Sc. (with 



illustiations and diagrams) .. .. .. .. .. 35 



Basis ofthe Will .. 37 



Notes. — Astronomical. By Charles P. Bdtler, A.R.C.Sc. 



(LoND.), F.R.P.S 38 



Botanical. By G. Massee 39 



Chemical. By C. Ainsworth Mitchell, B.A. (Oxon ), 



F.I.C 39 



Geological. By Edward A. Martin, F.G.S. .. 40 



Ornithological. By W. P. Pycraft, A.L.S., F.Z.S., 



M.B.O.U., &c 41 



Physical. By Alfred \V. Porter, B.Sc. .. .. 41 



Zoological. By R. Lydekker .. .. .. .. 42 



Correspondence (with illustration) .. .. .. .. 43 



Reviews of Books 44 



Microscopy. Conducted by F. Shillington Scales, B.A., 



FR.M.S 46 



The Face ofthe Sky for February. 



F.R A.S. 



By W. Shackleton, 



48 



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