392 



name of "Jasper Ledge." It has a very fine purplish rose col- 

 or, is exceedingly hard and fine grained and takes a l)eauti- 

 ful polish. A few good specimens may yet be found at the 

 Rock one of which was exhibited. 



Stephen D. Poole, of Lynn, remarked that there was 

 ground for very much doul)t whether this rock had any title 

 to be called a true Jasper. He believed it to be only a very 

 hard and beautiful variety of Compact Feldspar. Genuine 

 Jasperwasa silicious mineral, and considered wholly infusible 

 at least when heated alone ; but in numerous blowpipe ex- 

 periments with this mineral, he had always succeeded in 

 rounding and partially fusing the edges of the specimen. 



The discussion of this point was somewhat further extend- 

 ed by Messrs. C. M. Tracy of Lynn, and Moses G. Farmer of 

 Salem. 



J. C. Houghton, of Lynn, said that in this vicinity were 

 many fine examples of the rounded hills, moraines, &c. 

 caused by the vast forces concerned in the drift formation. 

 Not a few of those immense erratic rocks, or boulders, that 

 excite so great and very natural wonder, are located in this 

 vicinity. 



"Round Hill" so called, a few rods ftom this Hall, is an 

 excellent instance of an isolated mound of drift. In all its 

 features and aspects, the drift of Lynn and Saugus is suffi- 

 cient to engage the constant study of a lifetime with advan- 

 tage ; and he could add nothing at this time but to recom- 

 mend it to the attention of all those interested in geolog- 

 ical research. 



Some remarks at this point as to the English Walnut 

 Trees above mentioned led to an animated and pleasant de- 

 bate on the subject of planting ornamental and shade trees 

 in public places as in streets and school -house yards, which 



