A MONTHLY POPULAR JOURNAL OF KNOWLEDGE 



EDITED BY EDWARD LIVEING, B.A. 

 SCIENTIFIC ADVISER: A. S. RUSSELL, D.Sc. 



Trustees :-SIR J. J. THOMSON, O.M., F.R.S. 

 PROF. A. C. SEWARD, Sc.D., F.R.S. 



SIR F. G. KENVON, K.C.B., F.B.A. 

 PROF. R. S. CONWAY, Litt.D., F.B.A. 



Vol. III. No. 25. JANUARY 1922 



(Annual Subscription 12s. 6d. Post Free) 



PRICE Is. NET 



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THE RECENTLY FOUND RHODESIAN SKULL 



■< ^ TAGK 



EDITORIAL NOTES /^ ■ • • Y 



THE RHODESIAN SKtjt'L AND THE 



ANTIQUITY OF MAN 2 



E. N. Fallaize 



HELICOPTER FLYING MACHINES . 5 

 ' ' Rafex " 



NEW/fclGHT ON THE SILVER AGE OF 



HE0.AS\ 8 



/J. U^bowell 



THfE (^ioBLEM OF GRAFT-HYBRIDS . 12 

 ^rof. F.JE. Weiss 



IRrIATJONAL FEARS 15 



''. A. Hampton 



CONTENTS 



PAGE 



PRIMITIVE ARCHITECTURAL CANONS 18 

 Arthur Bowes 



AN EIGHTEENTH-CENTURY CHARAC- 

 TER (Concluded) 21 



Rowlands Coldicott 



REVIEWS OF BOOKS 23 



Forensic Chemistry — Radio-activity — Taboo 

 and Genetics, etc. 



BOOKS RECEIVED 



CORRESPONDENCE 



Unemployment — Christian Science and Sug- 

 gestion 



26 

 27 



JOHN MURRAY, 50a ALBEMARLE STREET, LONDON, W.l. 



