July 30 - Tuesday, Madison. The section at North Madison down the hill to Madison is as follows (on P.C.C., & H.L.P.R.): Heavy bedded Niagara dolomites with casts of Crinifera radiata, Atypa reticularis and others. Chunks after first level county. Seen 10 to 20 feet. Then bedded Niagara dolomites, almost shale in places with Phacocaylke romingeri (that globular heads), Calymene micranensis, Atypa reticularis 10 or 12 feet. (See 2-5 inches). Conformably follows passing into shale (then bedded) chalk and probably magnesian. About 10 feet, no fossils. Heavy bedded dolomitic limestone with here (corrugated) (looks like sandstone) are there a thin shale parting. It one of these collected to the lot packed. Oryzora, Defendita (? coecifera), Amblychir and Orthos senectus. Orthoceras common 25 feet. The fossils are few within 3 feet of the top. Followed by the same kind of rock but thinner bedded (3-6 inches). Upper 8 feet with some of the regular Richmond fossils. The lower 2' almost a reef of Calaprocera Faristella stiletta and some Tetradium, 10 feet. More thin beds of the same nature in them and thick beds with few fossils. About 8 feet. Then the thin bedded limestones and shales.