234 EDWARD H. SANBORN 



small as to be of no significance. During the decade ending 

 with the census year 1900, the only decrease in the amount 

 of power used in manufactures was in the District of Colum- 

 bia, which is without any particular significance from an in- 

 dustrial standpoint, as the District of Columbia does not rank 

 as one of the prominent manufacturing centers of the country. 



The largest increase in power in the past decade was in 

 the state of Pennsylvania, which in 1890 reported 986,789 

 horsepower, and in 1900 a total of 1,859,265 horsepower, 

 showing an increase in the ten years of 872,476 horsepower, 

 or 88.42 per cent. This increase is more than twice as large 

 as the gain in the next largest state — Ohio — which showed 

 an increase during the decade of 431,817 horsepower. 



The very large increase in horsepower in Pennsylvania 

 was due to the great development of the iron and steel indus- 

 try between 1890 and 1900, which more than doubled its 

 motive power during that period, the increase being 

 from 404,871 to 840,616, showing a gain of 435,745. This 

 industry thus accounts for one half of the total increase in 

 power reported for Pennsylvania. Other industries which 

 contributed largely to the increase were the lumber and wood- 

 working industries, which showed an increase of 27,516 horse- 

 power; the paper and pulp industry, which showed a gain of 

 19,537 horsepower; and the silk industry, showing an increase 

 of 19,270 horsepower. A large number of minor industries, 

 all of them showing a considerable increase, make up the re- 

 mainder of the very large gain which Pennsylvania shows. 



In Ohio, also, the iron and steel industry accounts for 

 more than one half of the increase in power during the last 

 decade. Out of a total increase of 431,817 horsepower, the 

 iron and steel industry represents 225,677 horsepower. The 

 lumber and woodworking industries show an increase of 23,952 

 horsepower, and the flouring and grist mill industry gained 

 13,526 horsepower in the ten years. The large expansion of 

 the industries using iron and steel is shown by the increase in 

 the amount of power used by the foundries and machine 

 shops of Ohio, which in 1900 reported a total of 53,928 horse- 

 power, as compared with 23,292 horsepower in 1890, an in- 

 crease of 30,636 



