4. On a New Diffusiometer and other Apparatus for Liquid Diffusion

Abstract

Supposing a tall glass tube open at both ends be cemented into a reservoir packed full of common salt, and the tube then carefully filled up with water, and the whole apparatus immersed overhead in a jar of water, in a few days or weeks (depending upon the length of the tube) particles of salt will arrive at the top of the tube and diffuse into the water atmosphere