. Contributions to Canadian biology. Marine biology; Natural history. 146 DEPARTMENT OF THE NAVAL SERVICE Section 6 GEORGE V, A. 1916 8. Bocabec river. 9. Bocabec river, farther out. 10. Digdeguash bay. 11. llagaguadavie river, near the mouth. 12. L'Etang harbour, off Indian point. 13. L'Etang harbour, off Trainor's landing. 14. Black's harbour, off Connors' factory. 15. Black's harbour, head of bay, equidistant from end and sides. 16. Beaver harbour. 17. Lepreau, off point with Square House. 18. Head of Musquash bay. 19. Bay inside Mahogany island. 20. Bay of Shag rocks (near St. John)
. Contributions to Canadian biology. Marine biology; Natural history. 146 DEPARTMENT OF THE NAVAL SERVICE Section 6 GEORGE V, A. 1916 8. Bocabec river. 9. Bocabec river, farther out. 10. Digdeguash bay. 11. llagaguadavie river, near the mouth. 12. L'Etang harbour, off Indian point. 13. L'Etang harbour, off Trainor's landing. 14. Black's harbour, off Connors' factory. 15. Black's harbour, head of bay, equidistant from end and sides. 16. Beaver harbour. 17. Lepreau, off point with Square House. 18. Head of Musquash bay. 19. Bay inside Mahogany island. 20. Bay of Shag rocks (near St. John). Oyster Culture, Southern New Brunswick. Mavor, Craigie and 2. Hydrographic Observations. For taking the water samples a Pettersson-Nansen water bottle was^ used. This consists of an insulated metal cylinder, open at both ends, which slides vertically on two parallel brass rods. At the lower end of the brass rods a cap is fastened, which, when the cylinder is lowered, closes its lower end. The upper end of the cylinder is closed by a similar cap, which slides on the brass rods above. The apparatus is so constructed that it can be lowered down with the cylinder open and, when it arrives at the depth desired, can be closed by sending a weight down the sounding wire. The temperatures were taken with a deep-sea reversing thermometer. In most cases the Richter reversing thermometer attached to the water bottle was used. (Laboratoire Hydrographique Kobenhavn, Preisliste, 1914, No. 75, Thermometer JSTo. 164). In the other cases a reversing thermometer by Negretti and Zambra, No. 170664, was used. In both of these thermometers the mercury column is narrow at a point just above the reservoir. By reversing the instrument at any required depth the mercury column is broken at the narrow part. The scale is the glass so that the temperature at the time of reversing can be read off from the length of the broken off part of the mercury column. In the Eichter thermometer
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