OF ARTS AND SCIKNCKS. II5 



Specimens of contorted strata. The second walk over Wilson 

 Hill took the class to several ledges. In one place a large piece 

 of trap enclosing hornblende crj^stals, was secured for the mu- 

 seum. At the City farm quarry good specimens of iron pyrites 

 and smoky quartz with crystals of feldspar were obtained. On 

 April 28 two ledges on North Union Street were inspected. In 

 one was an interesting dj'ke of trap, which in weathering 

 seemed to disintegrate in little nodules, instead of the angular 

 shapes that are so common. In the other ledge biotite and 

 muscovite were found in juxtaposition. South Manchester was 

 next visited with its several outcroppings of granite and gneiss 

 intersected in places by trap d3'kes. In one place a deposit of 

 magnetite, considerable for Manchester, was discovered and 

 much of it secured. In another place a small crystal of apatite 

 was found. The fifth walk was more geological than mineral- 

 ogical in its character. Rock Rimmon was visited, and from the 

 top of this high outcropping ledge the many signs of glacial ac- 

 tion of ice and water that are so abundant here were studied at 

 leisure. 



The last excursion was a barge ride together with the orni- 

 thological class. The combined classes numbered forty. Go- 

 ing over through Bedford, the first stop was made near the Cen- 

 ter, where a cut had been made through a ledge for the new 

 Manchester and Milford railroad. Several interesting dykes of 

 trap were shown in the walls of granite. From this place the 

 party proceeded to the northeast corner of Amherst, near the 

 village known locally as Joppa. Here is a small deposit of car- 

 bonate of lime, with smaller accumulations of vesuvianite and 

 garnet. The next stopping place was the "Pulpit," a some- 

 what remarkable gorge that was eroded during the glacial peri- 

 od, probably by water falling through a moulin in the ice-sheet 

 and flowing away below. On the return to Manchester a stop 

 was made at the Barr farm, where specimens of bog iron ore 

 were obtained, also some ochre that is found with the limonite. 



The inauguration of a summer school so early in the season 

 and in the way in which this was conducted was something new 

 and in the nature of an experiment, but its results have amply 



