376 Miscellanies, 



In 1821, I requested my assistant, Davis Hurd,* to measure the 

 dip in the strata at Black Rock. I can speak only from memory, 

 and at a considerable distance of time, but I think it was three feet 

 in twenty-four rods. This dip was also to the south. 



In regard to these appearances on the south-east shore of Lake 

 Erie, permit me to copy from a former publication : " This mineral 

 is confined to one stratum, which is three feet above the lake, and 

 declines south-westerly till it disappears in the waves. The angle 

 with the plane of the horizon is nearly one-third of a degree ; and 

 the other strata along shore dip in the same direction." 



I omit many observations on the intermediate region, and close 

 with the remark that inclined limestone probably forms the dams of 

 all our parallel lakes, as it does that of Lake Erie, (that is, ascend- 

 ing towards their outlets) and also underlies them. 



Greatfield, (Cayuga Co.) 2d mo. 20, 1830. 



The views of Mr. Thomas are corroborated by those of Professor 

 Eaton, particularly as exhibited on a profile, in a map communicated 

 to us some time since ; and it is stated that there has been no 

 communication between Mr. Eaton and Mr. Thomas on the subject. 



Direction and extent of Primitive ranges : Prof Eaton. — 1. The 

 Primitive rocks of Lake George, &c. cross the St. Lawrence at Og- 

 densburg, and run along the north-east side of Lakes Huron, Supe- 

 rior, &ic. ; and they are at least one thousand miles long. In this 

 State, they are separated into two or three ridges, however, as you 

 see on our map. From Little Falls on the Erie canal, the gneiss 

 range is unbroken as far north-west as the extreme termination of the 

 great chain of lakes. I have received specimens horn Dr. Zina 

 Pitcher,! of the U. S. army, making an unbroken chain throughout. 



There is certainly genuine upper secondary oolite in large quantity 

 in Franldin, Bergen county. New Jersey. Dr. Horton, of Goshen, 

 Orange county, collected specimens there in place. 



14. Cannel Coal in Ohio. — That elegant species of coal, found 

 abundantly in Lancashire in England, and called cannelj coal, has 



* Late principal engineer of the Farmington Canal, in Ct. 

 t Brother of Governor Pitcher, of the State of New York. 



t Which in tlie local dialect means candle coal, as it is, or was used, as a substitute 

 for candles, on account oi its burning with so much brilliancy- 



