MUSEUM OF COMPARATIVE ZOOLOGY. 201 



Jackson's notes of his trip to Ktaadn contain only the following brief 

 statements respecting the rocks hi situ which he saw on the way to and 

 from the mountain. First, the one previously quoted in full, that Joe 

 Merry Mountain "is composed of granite."* Second, that, "leaving our 

 boats, we walked to Pock-wock-amus Falls, where the river rushes over a 

 ledge of granite." t Third, " All the rocks at Quakish Lake J arc 

 granite, and the water falls over huge bowlders of that rock."§ 



Dr. Jackson's assistant, Mr. J. T. Hodge, had preceded him by three 

 months in the passage up the river. He speaks of but one of the two 

 hills I have described as lying west of Katepskonegan Dead-water, 

 saying: "On its western side is a high hill of granite, covered with 

 immense loose blocks of the same rock, piled one upon the other almost 

 perpendicularly." He adds : " Two miles above [a fall over " loose 

 granite rocks"], we were obliged to carry by again on the western side. 

 The opposite bank is formed of granite .... lying in the best position 

 and form for working." Continuing, he remarks : " Not far above 

 this we arrived at a fifth portage, which is called the Pauquakamus [in 



fixct Aboljacarmegus] At the head of this portage, the bank is a 



smooth ledge of granite." || 



Mr. J. C. Houghton, who for the year 1861 was Hitchcock's assistant, 

 furnished for his report the following facts. In the account of a trip 

 from Moosehead Lake down the Penobscot to Ktaadn and beyond, he 

 notes that at the fourth and fifth portages " the river falls over ledges 

 of fine granite." IF Respecting the fixed rocks upon the river and lakes 

 below, he makes no further remark than that " near the outlet of Xorth 

 Twin Lake is the southeast limit of the granite, and the quartz rock 

 [which he had last seen between Chesuncook and Eipogeuus Lakes] 

 again appears." ** 



Elsewhere Mr. Houghton mingles facts and conjectures. Having vis- 

 ited the ■' Katahdin Iron "Works," f f which are situated in the township 

 that corners upon Brownsville at the northwest, he proceeded twelve 



* Second Report on Geology of Public Lands, p. 11. 



t Ibid., p. 14. 



t Quakish Lake on Hitchcock's map is placed outside of the gianite district, the 

 last granite in place being now known to occur a little below Xorth Twin Lake, above 

 Quakish. 



§ Ibid., p. 20. II Ibid., p. 53. 



H Prel. Rep. Nat. Hist, and Geol. of Maine, p. 4-10. 



** Ibid., p. 440. 



tt A confusing misnomer, since they are situated full thirty miles in a straight line 

 from the mountain who.se name they bear. 



