394 F. B. GUTHRIE AND R. HELMS. 



Another series of 5 pots was sown on July 30th with 

 freshly prepared ammonium sulphocyanide, as the solution 

 of cyanide used in the above series had been in stock for 

 some time, and it was thought probable that it had under- 

 gone decomposition : — 



No. 113, *007 per cent, ammonium sulphocyanide. 

 „ HI, *008 

 „ 115, '009 



„ no, -oio 



,i Hi) Ul« M , , , , 



In none of these cases did the plants germinate, the 

 results are consequently inconclusive and the experiments 

 . will have to Ik* repeated. 



Experiments with sodium chlorate. 

 Pots were Ailed as follows: — 



\m. 118, '001 per cent, sodium chlorate. 

 „ 119, -002. „ 

 „ 120, '003 

 m 121, '004 

 „ 122, '005 

 „ 123, '006 



All pots germinated well, except Nos. 122 and 123 in which 

 the germination was much retarded and the plants very 

 weak. On December 13th, the plants in Nos. 118 and 119 

 were growing well when examined. In No. 120 the growth 

 was good, but the leaves had a tinge of yellow at the tips. 



In 121 and 122 the growth was markedly affected, and in 

 123 the plants were dying. In these three last pots the 

 leaves were distinctly yellow. 



Three additional pots were sown on July 30th, 1903, with 

 larger preparations of chlorate : — 



No. 121, *006 per cent, sodium chlorate 

 „ 125, *007 

 „ 126, -008 



In none of these cases did the plants germinate. 



