8. On Aphis Persica. 9. Edible Birds Nests, how
formed. 10. Pilot-fish. 11. Effect of Mountain
Air on Man. 12. Temperature of Fishes. 13.
Salmon of the Columbia River. 14. Respiration
of Birds. 15. On the Mytilus polymorphus, or
the Driessena polymorpha, a remarkable species