| Chapter I. The Harmas | 10067 |
| Chapter II. The Anthrax | 6510 |
| Chapter III. Another Prober (Perforator) | 6964 |
| Chapter IV. Larval Dimorphism | 7054 |
| Chapter V. Heredity | 5884 |
| Chapter VI. My Schooling | 4138 |
| Chapter VII. The Pond | 6161 |
| Chapter VIII. The Caddis Worm | 7825 |
| Chapter IX. The Greenbottles | 6686 |
| Chapter X. The Gray Flesh Flies | 15412 |
| Chapter XI. The Bumblebee Fly | 5928 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 33722 |
| Chapter XIII. Mathematical Memories: My Little Table | 5139 |
| Chapter XIV. The Bluebottle: The Laying | 6935 |
| Chapter XV. The Bluebottle: The Grub | 7390 |
| Chapter XVI. A Parasite of The Maggot | 7337 |
| Chapter XVII. Recollections of Childhood | 6635 |
| Chapter XVIII. Insects and Mushrooms | 12443 |
| Chapter XIX. A Memorable Lesson | 9019 |
| Chapter XX. Industrial Chemistry | 6688 |
