IV 
Chapter XXXI page 
The Spirochaetae. Relapsing fever - 375 
Chapter XXXII 
Yellow fever. Stegomyia calo'pus - - - 384 
Chapter XXXIII 
Blood-sucking flies. Tsetse flies, etc. - 386 
Chapter XXXIV 
Fixatives. Stains. Weights and measures. Apparatus. 404 
