15 
a plot received less than twenty-five pounds, while 
at Northfield the plot with the least R AF, ly D, received 
twelve and a half pounds to the acre the other hand, none 
at Northfield received more than 100 pounds, (A), while at 
utley AA represents 200 pounds to the acre. 
In several cases, a second crop was planted on plots from which 
the first crop was harvested early in the seaso 
Some of the facts indicated by these results val now be stated. 
the influence of the proper amount of . The largest gain 
recorded at Nutley was 129 per cent.; at Northfield 135 per 
ably the yield of all as will be decreased if a sufficient 
excess is applie In most of the cases, such excess was not 
reached by the 200 a 2 AF to the acre, See in most 
cases the greatest. gain was attained by a smaller am 
mount of radium required for the greatest ae aed 
with different crops 
AA was best in five cases. 
BB was best in eight cases. 
CC was best in five cases. 
DD was best in eleven cases. 
Families of plants showed the same varying susceptibility. 
enormously benefited. In this connection, it is to be noted that 
ns have been peculiarly benefited, because of the special 
activity of radium on young growing leaf tissue. It is also to 
e noted that all observers have remarked on the great effect in 
improving the showiness of flowers. 
he effect of the R A F ona second crop on the same ground 
was greater than on the first. This is probably due to the more 
