428 BOARD OF AGRICULTURE. 



rocks in Maine are now esteemed. The region in Maine being 

 still a wilderness, the prospect of finding valuable ores for some 

 time yet, is lessened. 



Marble and Limestones. 



The marbles to be found in Maine will occur chiefly upon the 

 belt of Helderberg limestone running from Matagarnon (East Branch 

 Penobscot) river north-easterly. All that we have learned addi- 

 tional respecting them the past year, is given in Dr. Holmes' re- 

 port. An excellent way to ascertain the limits of this formation 

 would be to send a party on foot through the woods to examine 

 and describe every outcrop. Without doubt the statuary marble 

 variety would be discovered in this way. Valuable limestones for 

 the manufacture of lime would, at all events, thus be discovered. 



Other localities of good limestones have been visited the past 

 season. That at Carroll sui-passed anticipation ; and similar beds 

 can be found in the vicinity, and in adjoining towns. It would be 

 a great desideratum to find limestone near Moosehead lake. 



Dr. Holmes thinks there is a good water lime in the south part 

 of Aroostook county. The specimens have not yet been tested. 



In our map of the country bordering upon Penobscot bay, the 

 distribution of the limestone bands is given more correctly than 

 ever before. And in the accompanying text, descriptions are given 

 of several beds not known at the time of writing our first report. 



It is stated in an early portion of the present Report that new 

 openings of good limestone could probably be opened in Thomaston. 

 Those considerations we venture again to call attention to. To be 

 sure the quantity of surface now quarried is so great that it will 

 take long to exhaust it ; still it is well to provide for the future, 

 especially wherever it is possible for land owners to realize some- 

 thing by the enhanced value of their property. 



Mr. Robinson of Thomaston, has discovered a few new outcrops 

 of limestone, since the printing of that portion of the report relat- 

 ing to limestones. He writes as follows respecting them : " The 

 localities that I mentioned in my letter, are in the range between 

 the Cochrane quarry in South Thomaston and the most southern 

 appearance of the limestone on the bay at Thomaston. This latter 

 locality and the intermediate openings, all agree in the character 

 of the limestone with the Cochrane quarry." 



