Fruit Injuries and Protection, Secondary Bloom 351 



surer if hung on a wire hook and only partially submerged 

 in oil. Another plan for lighting without the wick is to 

 carry a bottle of gasoline in one hand and pour a small 

 quantity on the surface of the oil in the heater and touch 

 it with the torch; this is rather dangerous, and it is no 

 work for children, and it is really too hazardous to be 

 recommended. When once the oil catches, it burns 

 freely from the surface. The burning may be regulated 

 by partially covering the heater with the lid. Most 

 heaters are easily extinguished by sliding the lid entirely 

 on. 



By using the proper refilling receptacle and with a 

 little care, the heaters may be refilled at any time while 

 burning. It is best to use a regular oil bucket for this 

 work. In refilling in the daytime a tank like that shown 

 in Figure 95 is most convenient. Three men with a 

 good pump to draw the oil from the cistern will refill the 

 pots on twenty acres in a ten-hour day. The engine and 

 the filling pump on the spray tank may be used for lift- 

 ing the oil. 



Coal burners may be placed in the orchard and filled 

 at any time. Should damp weather precede a cold wave, 

 they may be a little difficult to start, but the covers with 

 which they are provided protect the contents very well. 

 The heaters are usually charged with a handful of kindling, 

 a little waste saturated with crude oil or gas oil, and from 

 ten to twenty-five pounds of coal. Mixing a little kero- 

 sene with the heavier oil makes it possible to light more 

 rapidly with the torch. Dry tree prunings make very 

 good kindling when well chopped up. Large heaters with 

 flaring sides are best started by putting the kindling near 



