226 September 1749. 



the thuya, little birch-trees, wild cherry 

 trees, and others. 



THE runs near the river, on the weitern 

 fide, oppofite the ifle of Orleans, are very 

 high and pretty deep. They confift, in moft 

 part, of black lime-flate. There are likewife 

 fpme fpots which confift of a rock-ftone, 

 which, at firfl fight, looks like a fand-ftone, 

 and is compofed of grey quartz, a reddift) 

 lime-ftone, a little grey lime-ftone, and 

 fome pale grey grains of fand. Thefe parts 

 of the ftone are fmall and pretty equally 

 mixed with each other. The ftone looks 

 red, with a greyifli caft, and is very hard. 

 It lies in ftrata, one above another. The 

 thicknefs of each ftratum is about five 

 inches. It is remarkable, that there are 

 both elevated and hollow impreffions ciJF 

 pedtinites on the furface, where one like- 

 wife meets with the petrified fhells them- 

 felves ; but on breaking the ftone, it does 

 not even contain the leaft Veftige of an im- 

 prefilon or petrified (hell. All the impref- 

 fions are fmall, about the length and 

 breadth of an inch. The particles of 

 quartz in the ftone ftrike fire with fteel, 

 and the particles of lime - ftone effer- 

 vefce ftrongly with aqua-Jortis. The upper 

 and lower furfaces of the ftrata confift of 

 lime-ftone, and the inner parts of quartz. 

 They break great quantities of this f^one 

 *?**. 4 



