114 



VEGETABLE FORCING 



hours after fumigation is begun, but the more com- 

 mon practice is to wait until the next morning. The 

 houses may then be entered for a few minutes with 

 safety and the ventilators opened as wide as the weather 

 will permit. It is better not to stay 

 in the houses until the ventilators have 

 been opened for at least one-half hour. 

 The odor of the gas will be noticeable 

 the next morning, but this need cause 

 no concern. 



Sulphuric acid should also be handled 

 with care. It is destructive to clothing 

 and it burns the flesh. Flesh burns 

 should immediately be washed with 

 water, and oil or vaseline applied. 



Inasmuch as cyanide of potassium is 

 a most dangerous poison, it should be 

 kept under lock and key, away from 

 children. The smallest granule taken 

 internally will be almost certain to 

 cause death. 



It is a simple matter to determine 

 the number of cubic feet in a green- 

 house. For instance, suppose the 

 house is even span and 30 by 100 feet 

 in size, 6 feet from ground to eaves and 

 9 feet from eaves to ridge. The cubic 

 contents below the eaves would be 30 

 by 6 by 100 or 18,000 cubic feet. The 

 space above the eaves would be 30 by 

 9 by 100 divided by two, or 13,500 cubic 

 feet, a total of 31,500 cubic feet for the 

 house. To determine the space above 



spear; /, intestine; gt the eaVCS in Uneven-Span hoUSC, 



blind ends of testicles; draw a perpendicular line from the 

 ridge to the level of the eaves, thus 

 making two triangles. The contents 



Fig. 3fi. Male nem- 

 atode: I, worm in pro- 

 file view; II, head of 

 the same, more highly 

 magnified; III, middle 

 region of worm show- 

 ing blind ends of the 

 sexual organs; IV, pos- 

 terior extremity. The 

 drawings were prepared 

 from stained speci- 

 mens, examined in car- 

 bolic acid solution. 

 a, lips; b, oesophageal 

 tube; c, median bulb; 

 d, excretory pore; e, 



h, testicles; i, specula; 

 /, rudimentary bursa; 

 k, anus. (After N. A. 

 Cobb.) 



