Show topography of the th air explorations of the air have revealed an astonishing definiteness of arrangement to la its layers although of course the details are continually clui nging ley in england hns has dl di erected its ills studies of floating balloons to a solution of the question of the influence of the topography of the earths surface on the state of the air above aboe it ile he finds among other things lings ti that the disturbances produced by hills and valleys are transmitted to an unexpectedly great elevation affecting the lower and middle strata throughout A general effect noticed Is that the velocity of the wind or of a current of air Is increased over a hill bill find diminished d over a valley it Is in thought that similar observations generally rene rally distributed would provide a real topography of the air |