134 



GEOLOGICAL RECONNOISSANCE 



fire is fairly started ; and this is probably the reason why these coals, when 

 first introduced into the eastern cities, were rejected as altogether unman- 

 ageable and impracticable. Now, even the harder anthracites are in com- 

 mon use in Philadelphia and New York for heating apartments, and some- 

 times in open grates, with temporary blowers ; and it is now universally 

 admitted that, for forges, rolling mills, and blast furnaces for the manufac- 

 ture of iron, the semi-anthracites are unsurpassed. 



No. 11— PART OF THE BOSTON MOUNTAIN RANGE, NEWTON COUNTY. 



