CONTENTS 



PAGE 



PEARLS AND PARASITES - - I 



THE DEPTHS OF THE SEA - - l6 



BRITISH SEA- FISHERIES - 42 



ZEBRAS, HORSES, AND HYBRIDS 73 



PASTEUR - -. 10 1 



MALARIA - * 129 



'INFINITE TORMENT OF FLIES' .- - 155 



THE DANGER OF FLIES - 174 



CAMBRIDGE - - - 183 



INDEX 



- 217 



IX 



