Molecular realignments during the successive phase transformations of a binary mixture of smectogenic and aliphatic compounds have been studied. The layer spacing, which is about 38.5A in the crystal phase, abruptly increases up to 54A during the transformation to the smectic phase, because aliphatic molecules are taken into the smectic liquid crystals during the transformation. A myelinic texture is observed in the smectic phase in which the liquid crystals are swollen with the aliphatic molecules. In addition, the quadrupolar splitting is observed in the H-2-NMR spectra of the sample swollen with d(8)-octane, because the aliphatic molecules are averagely oriented parallel to the director of the smectogens in the swollen smectic liquid crystals.