it is probable by analogy that the inconspicuous submaxima X (Fig. 7) have similar significance, for they appear at points corresponding closely to X in Fig. 8. Calculation from the position of X on the ac and ab curves gives a position at 95° from b in the bc section of 4457; actually the bc curve shows a break at 100°. (3) In 4458 correlation on similar lines is possible for submaximum D which is especially prominent in the ab curve. There seems to be no corresponding point in 4457. (4) The curve representing limbs of type q in the ac section of 4457 has two maxima B and G at 60° and 105° respectively from the a axis. Correlation with the principal maximum in the ab curve using appropriate stereographic projections (Fig. 9) gives calculated maxima at 73° and 98° in the bc section. The observed maxima on the broken curve for bc are in fair agreement (70° and 110°) considering the fact that the bc and ac sections actually cut different veins. (5) In corresponding curves for 4458 (broken curve for ac in Fig. 8) two similar points L and N are separated by a third maximum M approximately parallel to c. These two points might equally well Fig. 10.—Stereographic projections of quartz fabric in veins cutting specimen 4458; the maxima in all three projections are deduced from the curves for ac and ab sections (Fig. 8). North is indicated by the arrow in the ab projection.