| Chapter I. The Harmas | 10224 |
| Chapter II. The Anthrax | 6639 |
| Chapter III. Another Prober (Perforator) | 7078 |
| Chapter IV. Larval Dimorphism | 7166 |
| Chapter V. Heredity | 5968 |
| Chapter VI. My Schooling | 4193 |
| Chapter VII. The Pond | 6277 |
| Chapter VIII. The Caddis Worm | 7935 |
| Chapter IX. The Greenbottles | 6788 |
| Chapter X. The Gray Flesh Flies | 15610 |
| Chapter XI. The Bumblebee Fly | 6020 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 34189 |
| Chapter XIII. Mathematical Memories: My Little Table | 5235 |
| Chapter XIV. The Bluebottle: The Laying | 7014 |
| Chapter XV. The Bluebottle: The Grub | 7501 |
| Chapter XVI. A Parasite of The Maggot | 7433 |
| Chapter XVII. Recollections of Childhood | 6726 |
| Chapter XVIII. Insects and Mushrooms | 12579 |
| Chapter XIX. A Memorable Lesson | 9101 |
| Chapter XX. Industrial Chemistry | 6783 |
