12 



PHYSICAL GEOGRAPHY. 



Museum. I understand Dr. Jackson left a collection of rocks and 

 minerals at Concord to illustrate his explorations. As they were entirely 

 destroyed by fire a few years since, I have no means of ascertaining what 

 their value may have been. 



>>?., 





Hj., -^ 





!' ^' '^1 M' mm 





.^- 



.£ 





^£* l^i.^ ,k' 



GRANITE LEDGE IN BARTLETT. 



