PROCEEDINGS 
OF THE 
ROYAL SOCIETY OF EDINBURGH. 
SESSION 1917-18. 
part ii] yol. xxxyiii. vv r r , v 7 - 224 
-= ^- - — ■ ■ — — ~ 
/ ^ 
to v , 
V .. ' * ^ 
CONTENTS. \'V .... 
'Hr j * _ .. ,, •• ~ 
NO. 
XII. The Sound-Waves and other Air-Waves of the East London 
Explosion of January 19, 1917. By Charles Davison, 
Sc.D., F.G.S. Communicated by The General Secretary, 
(Issued separately June 17, 1918.) 
XIII. Phycomycetous Fungi from the English Lower Coal Measures. 
By David Ellis, Ph.D., D.Sc. (With One Plate and Eight 
Text-Figures), . . . . . .130 
(. Issued separately August 22, 1918.) 
XIV. Note on the Construction of an Orthogonant. By Sir 
Thomas Muir, LL.D., F.R.S., , . . . 146 
(Issued separately August 22, 1918.) 
XV. The Formation of the Germ-Band in the Egg of the Holly 
Tortrix Moth, Eudemis noevana (Hb.). By Miss L. H. 
Huie, F.E.S. Communicated by J. H. Ashworth, D.Sc., 
F.R.S. From the Department of Invertebrate Zoology, 
University of Edinburgh. (With Two Plates), . . 154 
(Issued separately September 26, 1918.) 
XVI. Mirage on the Queensferry Road. By Alexander G. Ram age, 166 
(Issued separately September 26, 1918.) 
[ Continued on page iv of Cover. 
EDINBURGH: 
Published by ROBERT GRANT & SON, 107 Princes Street, and 
WILLIAMS & NORGATE, 14 Henrietta Street, Covent Garden, London, W.C. 2. 
PAGE 
115 
Price Seven Shillings and Sixpence. 
