A GENERAL VIEW 3 



and some of the ranges covered four acres of land. This 

 district then had about 60 acres of glass devoted ex- 

 clusively to vegetable forcing. 



There are more acres of glass devoted to this industry 

 in Ohio than in any other state. In 1912 Toledo had 

 about 40 acres under glass, one of the ranges covering 10 

 acres; Cleveland had about 25 acres and Ashtabula 

 probably an equal area. There are large houses at 

 Newark, Columbus, Cincinnati, Lancaster and many 

 other smaller cities and towns. It is estimated that, in 

 1912, about 140 acres of glass were used in Ohio for the 

 forcing of vegetables. Greenhouse building has been 

 active in some of these sections since the 1912 estimates 

 were made. 



Although there are some spacious houses at various 

 places in Michigan, Grand Rapids is the most important 

 center. This district had from 35 to 40 acres of vegetable- 

 forcing houses in 1912, and one establishment covered 

 over four acres of land. 



Irondequoit, New York, is well known for its large 

 number of houses of medium size. No establishment in 

 this district contains more than four acres, and most of 

 the ranges cover less than one acre. There were 65 

 houses in 1912 within a radius of three miles, and they 

 included a total area of about 25 acres, so that the average 

 is less than one-half of an acre. They are almost invari- 

 ably operated in connection with market gardens, and 

 are of great value in the starting of early plants. 



There are many vegetable-forcing establishments in 

 Pennsylvania, although less progress has been made 

 there than in several other states. The industry is most 

 prominent at New Castle, Erie, Altoona and Kennett 

 Square. 



In Illinois there are large ranges at Chicago, Aurora, 

 Streator, Morrison and other points. There are many 

 extensive establishments in Indiana, Iowa, Minnesota, 



