EXPENSES FOR HEAT AND LABOR, 15 
times. In large establishments, two men working to- 
gether can turn off as much as three men working alone 
in small establishments. 
KENTUCKY— 
23. For ordinary winters (southwestern Kentucky), 250 
bus. coal at 10 cents. For severe winters, 350 bus. 
One man will care for three such houses. 
WASHINGTON— 
24. To heat a 20x 150 ft. house, three-fourths span, 1o ft. 
high, for tomatoes, will cost here (Seattle) about $50 per 
year with 4-ft. fire wood at $1 per cord. I use steam. 
Two men will take care of the crops and do the firing 
for two houses 20x112 ft., one house 52x 150 ft., one 
house 20x 150 ft., and three houses 20 x 80 ft. 
Note.—The reader will find tables for computing the radiating and 
grate surfaces in the heating of glasshouses, and other greenhouse 
matter, in the last edition of The Horticulturist’s Rule-Book. 
