SCIENTIFIC SURVEY. 375 



them to erect mills and houses and public buildings, they will here 

 find no dearth of most durable material for the same — no scarcity 

 of granite and lime and marble to meet all the demands and pur- 

 poses that may be ever required for architectural strength, endur- 

 ance and beauty.* 



The general direction of the strata is north-easterly. The extent 

 of the formation I am not able to give. It becomes covered by the 

 soil, and is hidden from view. Pursuing the general course of the 

 strike, which leads you in a direction across the township diago- 

 nally, it again turns up at the Tunnel rocks iu Murch's or Horse- 

 shoe lake in the next township. No. 5, R. 8. As a pretty full 

 description of this locality has been given in last year's report, it 

 will not be necessary to say more here rn regard to it. It is well, 

 however, to note it, as being the next link in the chain of these 

 Helderberg formations, the existence of which this survey has been 

 instrumental in discovering. 



The next show of it, on this line of strike, is that discovered by 

 Dr. Jackso'n, at the foot of the first Seboois lake, an extract from 

 whose description you gave in your first report (page 413). On 

 his authority it is stated to be in township No. 1. I did not arrive 

 at the rock in place when at that lake, but judging from the range 

 of the boulders and other observations, I think, instead of being 

 in No. T, it is in upper, or north-east part of No. 6 of the 7th 

 range.f 



Dr. Jackson also describes a locality of this rock on Peaked 

 mountain, in No. 4 of R. t. I have not seen this, but if it is 

 identical with the rock in question, it must belong to another belt, 

 as it is east of the range of the belt we are describing. 



Continuing our course, we next find a splendid locality of it, 

 cropping out near the north-east corner of lot 16 in No. 1, R. 6. 

 I explored this ledge some years ago. It breaks up from a compar- 

 atively level plain, forming an abrupt, precipitous ledge, on one 

 side fifteen or twenty feet in height. Its true location had been 



*AtWhetstone Falls a few miles below, on the Penobscot, is a splendid water 

 power with a good site for buildings. Had the State reserved the fee of the soil in 

 itself, and given proper encouragement to settlers, there would long since Lave been 

 a thriving village here. 



t It is very difficult, if not impossible, in a dense forest and in the absence of a 

 correct plan based upon an actual survey, to give the true geographical position of 

 any rock. In this particular we realized the truth of the remark of Sir William 

 Logan, Principal of the Canadian Geological Survey, in which he declares, "accu- 

 rate topography is the foundation of accurate geology." 



