J. E. M. Mellor 



75 



On October 2nd several larvae of M. domestica were seen on the 

 inside of the control tub, escaping from the excess of heat. The tempera- 

 ture about 6 inches below the surface was, at that time, about 67° C. 

 No life was apparent in the other tubs. On October 3rd many very small 

 flies and a few Psychodidae were seen inside the muslin covering the 

 control, and very many very small larvae were seen energetically 

 writhing at the ends of protruding straws, as if trying to escape from the 

 heat below; a dead beetle was found on No. 4 and a few live beetles on 

 the remainder. On October 11th 1 cwt. horse manure, procured from the 



Fig. 5. A, balloon trap: B woodon square with hole in centre supported by four wires 

 fastened into hoop inside tub: C, muslin; I), supporting wire: E, tape to hold mushn: 

 F, surface of manure (1 cwt.): G, wooden tub. 



same source and treated in a similar way to the first 5 lots, was placed 

 in tub No. 6 and sprayed "incrementally'' with a solution of borax 

 (1 oz. borax, 1 qt water: 1 cu. ft manure). 



On the first 5 days tubs 2, 3 and 4 gave higher temperatures than 

 the control; but No. 5, which had been sprayed incrementally at the rate 

 of 4 gallons to 1 ton, showed a lower temperature on the first three days 

 and a higher on the fourth and fifth. This seems to suggest that Creosote 

 Oil Mixture, when applied to the surface, tends to retain the heat 

 generated below, so that the heap takes longer to cool; but that if 

 apphed incrementally in sufficient quantity, fermentation is delayed and 

 the temperature rises more slowly (Chart IV). 



