1902 Science  
presented the results of systenmatic observations on the effect of the wind on the migration of hawks and many other birds along the Atlantic coast. The priincipal points of the paper were illustrated by means of diagrams givilng the directions taken by the migrating birds under the influence of different winds. It was shown that a knowledge of meteorology was necessary in considering this subject, because the effective wincds depend on storm centers traveling eastward. In one case, in the
more » ... t of the southward migration, a stornm center off the coast of AMaine caused northerly winds throughout 800,000 square miles in the easterli part of the United States and Canada, the velocity of the wind area averaging twenty miles per hour. A former paper on the subject was briefly reviewed, in whieh the author showed that flights of hawks and other land birds during the migrations were due to the crowding of the birds in a narrow coastline path by the wind. The recent observations now warrant the conclusion that halwks and many other birds regularly depend on a favorable wind as a help in their migratory movemients, and, as a rule, migrate only when favorable winds occur. A brief account was given also of a retrograde nmovement of migrating swallows in the spring, evidently due to a return flight of the birds after they had been blown far out of their course by a strong wind from the west. IIENRY E. CRa1PTO:NoN Secretary. SECTION OF ANTHROPOLOGY A.ND PSYCHOLOGY. A MEETING was held on MIarch 28, Professor Farrand in the chair. The present sectiornal officers were reelected for the ensuing year. Dr. Clark Wissler reported on the growth of boys. The annual physical measurements of sonie three hundred schoolboys were correlated to discover tendcencies and directions of growth. It appeared from the data that growth was rather uniform, as for example, when a boy's legs were growing rapidly his arms were also growing at a correspon(ling rate. By correlating the stature with its increment for the followinig year it was 627 seen that the sign of correlation changes when the pubertial maximunm of growth is crossed. This means that boys who are growing rapidly at twelve, for example, continue to grow rapidly until fourteen or fifteerl, when they slow down, while those growing slowly before this period now grow rapidly. Thus it appears that the point of pubertial maximumn rate of growth, as determined by mass measurements, is really the point dividing the boys who mature early from those who mature late. The relation is yet more in evidence when the annual increments are correlated without regarding the absolute measurements. The results as a whole seem to show that the rate of growth in any particular year is of no special significance except as an index of the relative ma-
doi:10.1126/science.15.381.627 fatcat:z3c2pgsf6jakjkkawov2klq6wy