LIST OF ILLUSTRATIONS. 
Plates 53 & 54. — Messrs. C. and F. Chambers on the Mathematical Expression of 
Observations of Complex Periodical Phenomena. 
Plates 55 to 58. — Professor Allmajst on the Structure and Development of Myriothela. 
Plates 59 to 64. — Messrs. Lockyer and Seabroke on Spectroscopic Observations of the 
Sun. 
Plates 65 to 68. — Mr. J. Prestwicii on Submarine Temperatures. 
