The drop size distribution of the lithium amalgam produced by mercury jet cathodes was studied experimentally. Electrolysis was done in aqueous solution, 3 mole LiOH per liter, at ambient temperature, Jets were obtained by passing mercury through small orifices made in a Plexiglas plate, The orifice diameter was varied from 28 to 70 mu m, the hydrostatic mercury pressure from 200 to 800 mmHg, and the electrolysis voltage from 0 to 6 V. An optical method for drop size determination was carried out. Within the limits of experimental errors, a unique distribution was obtained for all cases. The volume fraction vs. drop diameter curve resembled a Gaussian distribution having the mean diameter <(D)over bar(v)> = 209.7 mu m and the spread sigma(v) = 39.1 mu m.