SCIENTIFIC SURVEY. 413 



G. ECONOMICAL GEOLOGY. 



A brief description was given in the first report upon the Geol- 

 ogy of Maine, of all the mineral substances found within its limits 

 that are of value in the Arts. That account will now be continued 

 in the form of a sequel. We will notice the most important 

 economical discoveries that have fallen under our notice during the 

 second year of the Survey. We will speak of L'on, Gold, Tin, 

 Antimony, Lead, Copper, Marble, Limestones, Gypsum, materials 

 for the manufacture of Grindstones, Roofing Slate and Water Lime, 



We have nothing of great consequence to add respecting the 

 value and distribution of the Manganese, Arsenic, Zinc, Granite, 

 materials for the manufacture of Glass, Flagging Stones and Clays, 

 thei'e described, although much information respecting their quantity 

 remains to be acquired. 



Iron. 



Last year a very important ore of iron was described in Wade 

 plantation, in Aroostook county. Late in the season one of us 

 visited the locality'-, and immediately afterwards wrote the follow- 

 ing letter to the Commissioners to whom we are responsible for the 

 conduct of the Survey. The opinions expressed in it we still 

 entertain. 



Ashland, Me., Sept. 13, 1862. 

 To His Excellency Israel Washburn, Jr., 



and S. L. Goodale, Esq. 



Honored Sirs : — According to the contract between myself as 

 State Geologist, and the authorities, I am bound to make known 

 to the State, discoveries of any valuable substances upon the 

 public lands. 



In accordance therewith, I am about to speak of the valuable 

 deposit of iron ore in No. 13, R. 4, of Aroostook county, or 

 " Wade plantation" of the maps. This deposit is in the south-east 

 part of the township, upon the land occupied by Daniel Ilickey. 

 In my report of last year, it was noticed in two places— first on 

 page 295, where Dr. Jackson's authority was quoted ; and sec- 

 ondly, on page 435, in Assistant Packard's report. For details of 

 position, amount, &c., I would respectfully refer you to those two 

 places in my report. 



The importance attached to this locality arises from the quality 



