Bats, Mosquitoes and Dollars By Dr. Charles A. R. Campbell

(The smallpox section of the book first appeared online here and in its entirety at the Soil and Health Library, an important source of books
on holistic agriculture, holistic health, self-sufficient living, and personal development)

Preface & Introduction

PART I 

Bats, Mosquitoes and Dollars Intro
Allegation One That the malarial mosquito is unquestionably one of the greatest enemies of mankind
Allegation Two That the bat is one of man's best friends because it so relentlessly destroys the malarial mosquito.
Allegation Three That we can build a home for bats......and eradicate the malaria in the vicinities where the homes are erected.
Allegation Four That each bat roost, in addition to its great hygienic value, is in itself a little gold mine, by reason of the cash obtained from the natural high-grade fertilizer, the guano, which it will constantly produce.

PART II  Observations on Dragon Flies MAN'S BEST FRIENDS IN THE INSECT WORLD

PART III: Bedbugs and Smallpox

Foreword By J. A. L. WADDELL, D. E., LL. D.
Résumé of Experiments on Variola.
My Observations on Bedbugs
Eradication of Smallpox By Other Means Than Vaccination (Founded on the above.) By J. A. WATTS, M. D.

PART IV

Functions of the Spleen
Glossary of Technical Terms