46 VEGETABLE FORCING 
likely to be much more faithful in the performance of their 
duties if they know that a bell will inform the proprictor 
that the temperature is not being properly controlled. 
It is not unusual for illness or accident to interfere with 
the work of the night men, and in more than one instance 
the sudden death of the fireman has- caused serious 
damage to the crops if not their total loss. 
