Abstract
Sodium chloride seed crystal was prepared in a stationary solution to yield asmooth surface, and was placed in a stream of supercooled solution having imaginary NaCl nuclei. In each test, seed crystal barely grew during the period correlated with supersaturation, but its surface was observed to become rough. After it began to grow, the average growth rate was obtained from increment of crystal seed size for the operational period. The observed crystal growth rate increased with increases in the populations of nuclei supposed to be suspended in supercooled solution. Crystal growth rate is discussed considering two processes: formation of surface roughness and becoming smooth with the increase in crystal size.
