Manufacturing Regions of the United States 249 
UNITED STAlk. 
PERSONS ENGAGED 
MANUFACTURIN 
Fic. 165. In the region marked A on this map, 50 per cent of the workers or more are engaged 
in manufacturing ; in that marked B, between 50 and 40 per cent; C, between 40 and 30 per cent ; 
D, between 30 and 20 per cent; E, between 20 and 10 per cent; F, less than 10 per cent. What 
states are wholly or partly in the most intensive manufacturing area? the least intensive? 
Look at the primary production maps in Part One to discover whether any of the chief areas for 
primary production coincide with the manufacturing areas. 
and north of the Ohio are engaged in manufacturing. Some of the 
chief reasons for the great development of manufacturing in this re- 
gion are as follows : 
(1) The northeastern quarter of the United States has a climate 
that gives a healthy person pleasure in active work. 
'2) It has access to two important bodies of water, the Atlantic 
Ocean and the Great Lakes. 
It contains the greatest coal mines in the world ; it has abun- 
dant water power; and the world’s greatest iron mines are 
within easy reach by water. 
(4) The climate and, in large areas, the soil and relief are admirably 
adapted to produce large supplies of food and raw materials. 
On the east this section faces Europe, a fact which not only 
favors trade now, but has given the region a stream of energetic 
settlers bringing with them a high civilization and furnishing a 
splendid supply of labor. 
The parts of the United States west and south of the manu- 
facturing section supply abundant food and raw materials, 
including wheat, corn, hides, wool, and cotton. 
Within the northeastern section three manufacturing districts stand 
out as especially important: (1) the North Atlantic district; (2) the 
Central New York district; and (3) the Great Lakes-Ohio River. or 
6)