CONTENTS 



PACK 



I. Introduction 381 



II. Statement of Fish and Gas-waste Pollution Problem 381 



III. Material and Methods 383 



1. Character of University of Illinois Water 383 



2. Treatment for keeping Fishes Alive 384 



3. Difficulties to be Guarded against in Fish Experiments 385 



4. Fishes used 387 



IV. Gas Waste — Its Character and Constituents 358 



V. Toxicity of Waste 389 



1. Methods of Experimenting 390 



2. Toxicity of Waste and Tar 391 



3. Toxicity of Illuminating Gas and Constituent Gas-mixtures 392 



4. Reactions of Fishes to Waste 392 



VI. Toxicity of Illuminating Gas Waste Constituents 394 



VII. General Discussion 406 



VIII. Summary 409 



IX. Acknowledgments 410 



X. Literature Consulted 410 



