Stria and Furrows of the Rocks of Western New Yoi*k. 147 



S. 34° W. The angle at which these may cross each other, is 

 readily seen. In the distance of a few feet, many of these dif- 

 ferent directions are parallel to each other. The same is true of 

 the following. 



2. At a mile east of these falls, in the same rock, the bearings 

 are generally N. 22° W. and N. 8° E. Of the first direction, 

 there are many, and of the latter there are few. 



3. In an excavation made on Main street, the directions are 

 S. 33° W. and S. W., and S. 56° W. I made many observa- 

 tions on these striae and furrows. These three localities are on 

 the east side of the river, and the first and third are near the 

 banks of the Genesee. 



4. At the rapids of the Genesee and near the south line of the 

 city, many striae are nearly southwest. The rock is here so 

 finely polished, as to reflect light like a mirror, and is often in 

 deep and uneven surfaces. 



5. About one hundred rods west of the rapids, and just with- 

 out the city limits, are a multitude of furrows and strise. Some 

 are S. W., some S. 22° W., and some are N. 8° E., while one is 

 nearly N. The last shows its beginning and direction, and is 

 the only one I have seen in which the course in which the power 

 acted is evident. The beginning is a broken surface, as if a 

 heavy rock had fallen upon the surface and crushed it in part, 

 and then been moved northwards. This furrow is half an inch 

 wide. 



In some other places the directions are from southwest to north- 

 east, or the reverse. In all these cases no allowance was made 

 for the variation of the needle, about 5°. The earth over these 

 surfaces before their exposure was from three or four feet to ten, 

 and even from twenty five to thirty feet. In some instances the 

 directions or bearings of a line changed a degree or two in the 

 course of a few feet. 



To R. W. Haskins, Esq. of Buffalo, I am indebted for the 

 bearing of the grooves in the rocks in and about that city. The 

 observations were made by himself and Dr. Hayes at Black Rock,* 

 and in other places he was assisted by Mr. P. Sargeant ; all well 

 known to be highly intelligent, careful, and accurate observers. 

 In and about Buffalo they have noticed eight or ten localities of 



* See Dr. Hayes's remarks on the striae in the vicinity of Buffalo, in this Jour- 

 nal, VoK xxxv, p. 191. 



