| Chapter I. The Harmas | 9809 |
| Chapter II. The Anthrax | 6339 |
| Chapter III. Another Prober (Perforator) | 6818 |
| Chapter IV. Larval Dimorphism | 6902 |
| Chapter V. Heredity | 5742 |
| Chapter VI. My Schooling | 4005 |
| Chapter VII. The Pond | 6018 |
| Chapter VIII. The Caddis Worm | 7671 |
| Chapter IX. The Greenbottles | 6549 |
| Chapter X. The Gray Flesh Flies | 15245 |
| Chapter XI. The Bumblebee Fly | 5745 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 33225 |
| Chapter XIII. Mathematical Memories: My Little Table | 4987 |
| Chapter XIV. The Bluebottle: The Laying | 6810 |
| Chapter XV. The Bluebottle: The Grub | 7254 |
| Chapter XVI. A Parasite of The Maggot | 7169 |
| Chapter XVII. Recollections of Childhood | 6484 |
| Chapter XVIII. Insects and Mushrooms | 12248 |
| Chapter XIX. A Memorable Lesson | 8892 |
| Chapter XX. Industrial Chemistry | 6534 |
