| Chapter I. The Harmas | 10082 |
| Chapter II. The Anthrax | 6521 |
| Chapter III. Another Prober (Perforator) | 6971 |
| Chapter IV. Larval Dimorphism | 7063 |
| Chapter V. Heredity | 5888 |
| Chapter VI. My Schooling | 4142 |
| Chapter VII. The Pond | 6168 |
| Chapter VIII. The Caddis Worm | 7830 |
| Chapter IX. The Greenbottles | 6691 |
| Chapter X. The Gray Flesh Flies | 15421 |
| Chapter XI. The Bumblebee Fly | 5935 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 33775 |
| Chapter XIII. Mathematical Memories: My Little Table | 5144 |
| Chapter XIV. The Bluebottle: The Laying | 6943 |
| Chapter XV. The Bluebottle: The Grub | 7394 |
| Chapter XVI. A Parasite of The Maggot | 7344 |
| Chapter XVII. Recollections of Childhood | 6642 |
| Chapter XVIII. Insects and Mushrooms | 12449 |
| Chapter XIX. A Memorable Lesson | 9024 |
| Chapter XX. Industrial Chemistry | 6694 |
