390 Influence of Mines iqwn Land and Livestock 



According to this experiment therefore the effect of the lead was not 

 more marked than was the case with the oat crop grown in 1914 im- 

 mediately after the application of the galena. 



4. Immediate influence of Galena vjion Trifolivm. 



In order to find whether galena immediately after its application to 

 the soil acts very unfavourably upon trifoliuni another series of pots 

 was arranged, the soil and admixture with galena being the same as 

 already described for Pots 27-34. The pots were filled May 12th, 1915, 

 and the seed sown the same day. The crop was cut August 23rd, and 

 then air-dried and weighed. See Photograph "F."' The results are given 

 in Table XIV. 



Table XIV. 

 Immediate influence of Galena upon the groivth of Trifoliuni. 



Average weight 



5. Effects of Blende and of Iron Pyrites upon Oats. 



The minerals were finely groiuid and the manner of procedure was 

 similar to that already described in the experiment with galena. The 

 treatment and yields are given in Table XV. 



Table XV. 



Average weight Average weight 

 No. of pots Treatment of straw (gm.) of grain (gm.) 



35, 36 and 37 Untreated 22-5 19-3 



38 and 39 Blende = 



40 „ 41 „ = 



42 „ 43 „ = 



44 „ 45 „ = 



23 „ 24 Pyrites 

 25 „ 26 



•05 % Zn 18-5 20-2 



1 „ „ 15-0 212 



2 „ „ 17-2 210 

 •4 „ „ 14-7 180 



2 „ 19-2 25-2 



8 „ 34-2 32-2 



See Photograph "G." 



