lantic coast line had been surveyed only from Point Judith, on the coast of Rhode Island, to Cape Henlopen, at the entrance of Delaware Bay. "The new superintendent" says Prof. Henry in his memoir, "saw the necessity of greatly enlarging the plan, so as to embrace a much broader field of simultaneous labor than it had previously included. He divided the whole coast line into sections, and organized, under separate parties, the essential operations of the survey simultaneously in each. He commenced the exploration of the Gulf Stream, and at the same time projected a series of observations on the tides, on the magnetism of the earth, and the direction of the winds at different seasons of the year. He also instituted a succession of researches in regard to the bottom of the ocean within soundings, and the forms of animal life which are found there, thus offering new and unexpected indications to the navigator. He pressed into service, for the determination of longitude, the electric telegraph; for the ready reproduction of charts, photography; and for multiplying copperplate engravings, the new art of electrotyping. In planning and directing the execution of these varied improvements, which exacted so much comprehensiveness in design and minuteness in detail. Prof. Bache was entirely successful. He was equally fortunate, principally through the moral influence of its character, in impressing upon the Government, and especially upon Congress, a more just estimate of what such a survey required for its maintenance and creditable prosecution. Not only was a largely increased appropriation needed to carry out this more comprehensive plan, but also to meet the expenses consequent upon the extension of the shore line itself. Our seacoast, when the survey commenced, already exceeded in length that of any other civilized nation, but in 1845 it was still more extended by the annexation of Texas, and again, in 1848, by our acquisitions on the Pacific. Prof. Bache was in the habit of answering the question often propounded to him by members of Congress, 'When will this survey be completed?' by asking, 'When will you cease annexing territory?'"
Prof. Bache's policy of dividing the Atlantic and Gulf coast (we had no Pacific coast in 1843) into sections, and carrying on work in all the sections at the same time greatly allayed sectional jealousies in States which the previous operations of the survey had not reached and had great influence in winning public favor for the survey. He had a wonderful faculty for enlisting the efforts and talents of others in carrying out his plans. "As rapidly as means allowed, the services of American scientists throughout the land were enlisted in aid of the survey, and the whole intellectual resources of the country thus made tributary to its usefulness and success. Thus Walker, Peirce, Bailey, Agassiz, Barnard,
