CONTENTS 
ILLUSTRATIONS 
' PLATES 
i. Portrait of Benjamin Kendall Emerson, 
li. Diagram of evolution of life. 
iii. Diagram of transmutation of vertebrates. 
iv. Emerson loving cup. 
V. Emerson on Toronto University campus. 
vi. Elburz highest mountain of Europe. 
vii. Portrait of R. Ellsworth Call. 
viii. Ground plan of laccoliths. j 
ix. Flexing in Canadian^ Front ranges. ■ 
X. Pre-Cretacic distribution of formations in Iowa. 
xi. Portrait of Samuel Calvin. 
xii. Floor of Edwin natural bridge. » 
xiii. Deserted stream canyon near natural bridge. 
xiv. Natural bridges of Utah. 
XV. San Juan natural bridges. 
xvi. Iron County natural bridges. 
xvii. Portrait of John Casper Branner. 
xviii. Seasonal changes on face of Mars. 
xix. New Hippurites. 
XX. Anatomy of early trilobites. 
xxi. Appendages of early trilobites. 
xxii. Portrait of Alexander Karpinski. 
xxiii. Lepidodendrons from Talladega slates. 
xxiv. Skeleton of Lena mammoth. 
xxv. Cambric section of Mount Robson. 
