conglomerates are sun eroded mud layers broken up and reassembled by the next in coming of the sea. We proceeded down in the section and finally came upon the "Greenville" of the Leducian without seeing any Cam- brian. This is rather significant and should be looked into. The "Greenville" mantles one line com- pletely altered in serpentine with bands of asbestos, muscovite and other minerals. At the end of the ridge near the Summer Hotel we saw the intruding granite and in that way line down to Easton we came cross a thick pegmatite vein. At 6.24 left Easton on Letchworth I, for Allentown 18 miles further up the Delaware river.