. Transactions of the American Philosophical Society. ith the land above water, is warmerthan that over thofe which admit deep water between tliemand the coaft; but ftill it is colder than the adjacent fea. 5. The water within capes and rivers does not followthe above rules; it being lefs agitated, and more expofedto the heat of the fun, and to receive the heat from the cir-cumjacent land, muft be colder or warmer than that infoundings without, according to the fealons, and tempe-rature of the atmofphere. 6. The paflage, therefore, from deep to fhoal water maybe difcovered by a regular ufe of
. Transactions of the American Philosophical Society. ith the land above water, is warmerthan that over thofe which admit deep water between tliemand the coaft; but ftill it is colder than the adjacent fea. 5. The water within capes and rivers does not followthe above rules; it being lefs agitated, and more expofedto the heat of the fun, and to receive the heat from the cir-cumjacent land, muft be colder or warmer than that infoundings without, according to the fealons, and tempe-rature of the atmofphere. 6. The paflage, therefore, from deep to fhoal water maybe difcovered by a regular ufe of the thermometer, beforea navigator can fee the land; but as the temperature isrelative, no particular degree can be afcertained as a rule,and the judgement can only be guided by the in Auguft I found the water off Cape Cod to be 58^*by Fahrenheit, and at fea it was 69*^; inOdober the wa-ter off Cape Cod was 48, and at fea it was 59. Thisdifference was equally a guide in both cafes, though theheat was different at different feafons. I. 84 MARITIME OBSERVATIONS. philofophical refearches when in my power to do fo, hemay be confidered as the original author of what is nowpreiented for examination. It will be proper to fufpend any conclufions till thejournals have been attentively confidered, but as a guideto the obje£l of them, it may not be amifs to ftate fuchfaifls as it is prefumed the experiments have a tendency toeftablifh, 1. The water over banks is much colder than the waterof the main ocean, and it is more cold in proportion as itis lefs deep. 2. The water over fmall banks is lefs cold than thatover large ones. 3. The water over banks that are near the coaft is war-mer than that over banks far diftant, but it is colder thanthe adjacent fea. A. The water over banks ofthecoafl, i. e. thofe imme-diately conneded with the land above water, is warmerthan that over thofe which admit deep water between themand the coaft; but ftill it is colder than the adjacent fe
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