HOUSE-FLY TNVESTIGATIONS. 475 



oil, and Green Tar oil were mixed with soil at the rate of 1 in 40, 

 and used with manure in the proportion of 10 gallons of oiled 

 soil to 100 gallons of manure. Ten barrow-loads of treated 

 manure was dug into each plot sized 44 feet by 8 feet. French 

 beans and turnips were sown. 



Results, 



Gross weight of crop in lbs. 



Turnip. Bean. 



Blast-furnace Creoso'te 243^ 20^ 



Control 270 16 



Neutral Blast-furnace oil 215^ 18 



Control 232| 17| 



Green Tar oil 170^ 18 



2. At Messrs. Sutton's, Reading, who supply the following 

 report, substances were tested on mustard, being a quick-growing 

 crop : — 



Fifteen plots in all were treated, and the experiments were 

 cari-ied out in two series. Series I. consisting of Plots 1 to 10, and 

 Series II., Plots numbering from 11 to 15. Each plot was about 

 1 square pole in area. The land on which these experiments 

 were conducted was previously under mangel plants, and all of it 

 had precisely a similar treatment. 



Series I. — The heaps of dung for these plots were dug in on 

 June 26th, 1915, and the mustard sown on June 28th ; the 

 following tables serve to indicate the character of the dressings 

 with which the dung was treated, the dates on which the seed 

 germinated in each plot, and the respective merits of the plots at 

 the dates mentioned. 



Series II. — The dung in this case was dug in on August 13th, 

 1915, and the miistard sown on the following day ; the results 

 will be found in the. tables already alluded to. 



It is most sa,tisfactory that in both series not a single crop 

 should have failed, and that consequently it may be assumed that 

 dung treated with the chemicals employed by Professor Maxwell 

 Lefroy may be used for manurial purposes without hesitation. 



-Series I. "" 



Control No. 1 (untreated). 



Aa. Miscible oil, Heavy 24 ozs. diluted to 4^ gallons. 



Ab. „ „ „ 48 „. „ 9 



Ba. „ „ Light 24 „ „ 4^ „ 



Bb. „ „ „ 48 „ „ 9' „ 



Ca. „ „ 'P' 24 „ „ 4i „ 



Cb. „ „ „ 48 „ „ 9"" „ 



Da. „ „ 'F' 24 „ „ 4i „ 



Db. „ „ „ 48 „ „ 9" „ 



Ea. Westoran or Miscible 24 „ „ 4i „ 

 Tetrachlorethane. 



