| Chapter I. The Harmas | 10611 |
| Chapter II. The Anthrax | 6924 |
| Chapter III. Another Prober (Perforator) | 7306 |
| Chapter IV. Larval Dimorphism | 7351 |
| Chapter V. Heredity | 6179 |
| Chapter VI. My Schooling | 4308 |
| Chapter VII. The Pond | 6608 |
| Chapter VIII. The Caddis Worm | 8131 |
| Chapter IX. The Greenbottles | 7098 |
| Chapter X. The Gray Flesh Flies | 15922 |
| Chapter XI. The Bumblebee Fly | 6189 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 34913 |
| Chapter XIII. Mathematical Memories: My Little Table | 5396 |
| Chapter XIV. The Bluebottle: The Laying | 7188 |
| Chapter XV. The Bluebottle: The Grub | 7717 |
| Chapter XVI. A Parasite of The Maggot | 7622 |
| Chapter XVII. Recollections of Childhood | 6948 |
| Chapter XVIII. Insects and Mushrooms | 13018 |
| Chapter XIX. A Memorable Lesson | 9283 |
| Chapter XX. Industrial Chemistry | 6963 |
