| Chapter I. The Harmas | 9710 |
| Chapter II. The Anthrax | 6303 |
| Chapter III. Another Prober (Perforator) | 6774 |
| Chapter IV. Larval Dimorphism | 6861 |
| Chapter V. Heredity | 5705 |
| Chapter VI. My Schooling | 3969 |
| Chapter VII. The Pond | 5978 |
| Chapter VIII. The Caddis Worm | 7626 |
| Chapter IX. The Greenbottles | 6513 |
| Chapter X. The Gray Flesh Flies | 15203 |
| Chapter XI. The Bumblebee Fly | 5701 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 33018 |
| Chapter XIII. Mathematical Memories: My Little Table | 4946 |
| Chapter XIV. The Bluebottle: The Laying | 6774 |
| Chapter XV. The Bluebottle: The Grub | 7207 |
| Chapter XVI. A Parasite of The Maggot | 7124 |
| Chapter XVII. Recollections of Childhood | 6444 |
| Chapter XVIII. Insects and Mushrooms | 12190 |
| Chapter XIX. A Memorable Lesson | 8852 |
| Chapter XX. Industrial Chemistry | 6498 |
