National Geographic : 1927 Jan
Photograph byDr. Paul Bartsch THE NORTHERN END OF LOGGERHEAD KEY: DRY TORTUGAS Note the hook-shaped extremity of white sand, which varies in size and shape with the seasons, owing totheshifting oftheprevailing ortrade winds. The vegetation in the foreground consists of bay cedars. The little light prairies between these cedars arebeing used forexperiments in heredity with West Indian and Bahaman land shells. At the far end may be seen the plant of the modern Marine Laboratory oftheCarnegie Institution nestling in a small grove of Australian pines and coconut palms (see page 61). The yacht lying off thedock istheAnton Dohrn, which brings the scientists from Key West, the nearest port to the Tortugas. The launch is one of several used for cruising about thekeys.