(Received July 27, 1968)
The initial stage of the growth of iron whiskers was investigated using the Brenner method of the hydrogen reduction of ferrous chloride. A number of micro-crystals were formed on a fused quartz substrate, and their growth was followed. It was found that the growth of a whisker crystal did not always occur around a single axial dislocation, but took place as the result of the coalescence of several micro-crystals existing in a very narrow range. The reason why a perfect or nearly perfect crystal can be grown upon such a superposition of a number of nuclear crystals was explored experimentally, and then, a model of the possible mechanism was offered.