Letter from [Joseph Larmor], Cambridge, to 'My dear Dewar [? James Dewar] If he has crossover values of k for different times using the Tait table Larmor sent, they are reliable. 'No German gets an English result if he can help it', and [James Hopwood] Jeans being mathematical perhaps had no space for physical constants. Larmor describes a problem of osmotic pressure in a diffusion in water and the forces involved, which look big. In his correspondent's jelly there are no turbulent currents. Larmor gives a diagram illustrating diffusion from one globe to another; the solids involved might be pushed which ought to show in very dilute jelly. He describes the effects of being near a free surface, and in the absence of this and currents. 13 November 1916