A new crystallization phenomenon of ice from brine is described . Within a relatively narrow range of subcooled brine temperatures, large, plate-like free ice crystals of up to several inches in length were formed in the bulk of slowly traversing brine simultaneously with the growth of dendritic ice on a cold surface . System conditions under which the said phenomenon would occur were determined for brines containing 1,700 to 30,000 ppm sodium chloride and traversing at 0 .009 ft/sec . The salt concentration of melted samples of ice produced in this manner, with and without brine removal treatment is given .
1 . INTRODUCTION
In the course of an experimental investigation on salt entrainment in ice crystallized from slowly flowing brine as described in a companion paper by the authors (1), it was discovered that, under suitable conditions, large crystals of plate-like ice could be formed in the bulk of the slowly traversing brine over a wide range of salt concentration . The phenomenon took place only when ice crystals were simultaneously grown on a chilled solid surface elsewhere in the brine. Because these free ice crystals were of unusually large size, the possible application to freezing desalination immediately suggests itself. To the best of the authors' knowledge, this phenomenon of induced free ice crystallization has not been previously reported .
2. THE INDUCED FREE ICE PHENOMENON
The experimental facility used in the present investigation was the same as that built for the study of salt entrainment in ice crystallized from brine (1) and,