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cold winters of thofe climates, is, that there are 

 fub-marine caverns in the rocky iliores of thofe 

 iflands ; the mouths of which caverns, though 

 they be under water, may lead to hollows, fo 

 rifing within fide as to afford a convenient dry 

 harbour, fit to preferve thefe birds in a kind 

 of torpid ftate during the winter. The fea ly- 

 ing before the mouths of fuch caverns, and they 

 haying a vaft depth of mountain over them, 

 their inward capacity muft be defended from any 

 rigid cold, which may be a means to preferve 

 thefe fowls -, and late in the Spring (about May) 

 the time of the appearance of thefe birds, the 

 outward warmth of the air, and the returning 

 ftrong fun beams on the water, near the mouth 

 of the cavern, may, by a fmall degree of heat 

 and light, re-animate, as it were, thefe animals, 

 and bring them from their ftate of forgetfulnefs, 

 by degrees, to the ufe of life and motion, till ac 

 laft they are emboldened to launch forth for 

 another fummer, feek their prey in the ocean, 

 and propagate their fpecies on the neighbouring 

 rocks. 



It 



