BUILDING MATERIALS. 93 



convenient blacksmiths' shop, and strewed them in the soil near this 

 opening. 



Ochres. 



Bog-iron ores of the nature of ochre occur at Bow, Lancaster, Bedford, 

 Amherst, Merrimack, Bath, Madison, Grafton, Lebanon, Barrington, Gil- 

 manton, Mason, Lyndeborough, New Boston, Chesterfield, Nottingham, 

 Orange, Pembroke, Salisbury, Jaffrey, Moultonborough, Orford, Surry, 

 and Plainfield. One of the most extensive is upon the land of David 

 Colby, in the west edge of Hooksett, where I saw a few hundred pounds 

 of red and yellow paints that had been washed free from impurities and 

 prepared for the market. The material seemed to be sufficiently abun- 

 dant to be utilized. I have not seen the ochre manufactured into paint 

 elsewhere in the state. 



The other articles enumerated at the outset, viz., copperas, alum, titan- 

 ium, and moulding-sand, can be obtained from various localities. The 

 first could be manufactured at several localities in the Connecticut val- 

 ley, though not so as to be able to compete successfully with the works 

 upon Copperas hill. 



