SummaryA solution is obtained of the problem of diffusion from an elevated point source into a turbulent atmospheric flow over a horizontal groundz= 0. The mechanism of the turbulence is the one considered by D. R. Davies [1] when he obtained a solution of the same problem in the case when the source is at ground level, the specifications for the mean wind velocityV, and for the across‐wind diffusivityKy, and for the vertical diffusivityKz, beingVαzm,Kyαzm,Kzαz1−m, wheremis a constant. Predictions of the solution are that the maximum concentration at ground level of the diffusing matter varies inversely ash1·8in adiabatic conditions, wherehis source height, and that the distance downwind from the source to the point where this maximum concentration is attained varies, in these conditions, ash1·3.