ILLUSTRATIONS. 



The late Dr. A. W. Thomas, M.D. ... ... To face page 14 



Plate I. Orchis latifolia ... ... 44 



„ II. Nipadites and Nip as fruiticans ... „ 81 



III. Euonymus Mildew ... ... „ 84 



Diagrams of River-courses in the South of England 



Pages 86, 87, and 91 



Plate IV. Psilopleura hcemasoma. D.Jones ... To face page 98 



Diagrams illustrating the Graphic Solution of 

 Problems relating to the Laws of Boyle 



and Charles ... ... ... „ 104 



