. Biological survey of the Mount Desert Region. Natural history -- Maine Mount Desert Island. 46 BIOLOGICAL SURVEY OF Large gasoline tanks are set low and placed in zinc-lined sinks 'with drainage outlets to below water line in case of leakage. Ventilation for all this part of the boat is from two ventilators rinming down from the top of the bridge deck and then out of an opening at the stern. This entire space under the decks can be flooded at a moment's notice with carbon dioxide gas from a large tank carrying 300 pounds pressure and piped to all parts of the hold. I mention this as quite im
. Biological survey of the Mount Desert Region. Natural history -- Maine Mount Desert Island. 46 BIOLOGICAL SURVEY OF Large gasoline tanks are set low and placed in zinc-lined sinks 'with drainage outlets to below water line in case of leakage. Ventilation for all this part of the boat is from two ventilators rinming down from the top of the bridge deck and then out of an opening at the stern. This entire space under the decks can be flooded at a moment's notice with carbon dioxide gas from a large tank carrying 300 pounds pressure and piped to all parts of the hold. I mention this as quite important because when dredging and moving slowly, by touching up the engine now and then, there is always a forma- tion of gasoline vapor which must be taken care of. This danger of explosion was also taken care of by placing Ober- dorfer mufflers on the carburetor, thus preventing the escape of anv back-fire Fig. 11 Typical shore Frenchmans Bay. The large open cockpit shown in figure 12 approximates 16 feet long, 9? feet wide at the forward end and 61 feet wide at the stern, giving something over 130 square feet of space. The floor is heavily planked and sealed and made self-bailing. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Procter, William, 1872-1951; Mount Desert Island Biological Laboratory; Johnson, Charles Willison, 1863-1932; Blake, Charles Henry, 1901-. Philadelphia, The Wistar Institute of Anatomy and Biology
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