WHY CYCLING IS EASIER THAN WALKING. The English Medical Press has in-1 in-1 vited its readers to supply a rea on why a man on a bicycle expends less energy in covering a given distance 'than a man on foot. The following! I contribution states the case in a nat shell: The explanation ic, simple, viz., that on a ccle nearly al the energy expended ex-pended is concentrated on progression, whereas on foot th greater part is dissipated dis-sipated in maintaining the erect position posi-tion and in lifting the body sufficient-1 sufficient-1 to allow the swinging foot to clear the ground. It Is ob ious that to raise a body weiphin?, say. 140 pounds, only jhalf an inch fifty limes a minute tor i.an hour represents a substantial num-I num-I ber of foot tons. This is not at all dif ficult to determine experimentally, and the problem has been worked out ; again and again with virtually tho same results. nn