LIMITS OF ENDURANCE OF DIFFERENT FARM CROPS. 169 
Three more pots were sown on November 28th, contain- 
ing somewhat larger proportions of sulphocyanide:— 
No. 66, °008 per cent. 
ae O7,, OL 3 
a 08,5. 02 ea 
Nos. 66 to 67 germinated fairly but slowly and not vigor- 
ously, and No. 68 was somewhat more retarded. Their 
subsequent growth (January 15th, 1903) was more strongly 
affected. | 
The results show that proportions of ammonium sulpho- 
cyanide as low as ‘001 per cent. already affect the growth 
of the plant, though it will germinate freely until the 
amount reaches about °005 when the germination is not so 
vigorous and the young leaves are discoloured. The points 
at which germination and growth are actually prevented 
was not reached, but they are certainly very near °02%. 
A further series will have to be sown in order to establish 
this point. 
Experiments with sodium chlorate. 
Six pots were prepared as in the previous instance with 
the following quantities of sodium chlorate :— 
No. 69, ‘001 per cent. NaClO; 
a TOR x 
a th We ts 
» 42, O0F  ,, ‘9 
y) 78; OR) 4, %s 
99 i, ‘006 99 99 
The results are as follows :—November 3rd, Nos. 69, 70, 
and 71 had germinated freely, No. 72 showed the effects of 
the salt, germination being slightly retarded. In No. 73 
the foliage was discoloured, and in 74 the germination was 
very feeble and the young leaves discoloured and puny. 
On November 21st the growth in No. 69 was fair but 
distinctly affected. In Nos. 70 and 71 the growth was more 
L—Sept. 2, 1903. 
