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to the growth of these plants, and put on the scent. After scent- 
ing the ground for a time the animal stops to dig at frequent 
intervals until the plants are located. The animal is then taken 
way and the plants dug with an implement which is suited for 
shallow digging. Unless the dog is taken away he will eat the 
plants, since they are regarded as a great delicacy not only by 
man but by the lower animals as well. The dogs used for this 
purpose are especially trained and seem to take as much interest 
in locating these eae plants as does the average hunt- 
ing dog in trailing wild game. 
Pigs are often used s the same purpose in European coun- 
tries, but though they are especially keen in locating the plants, 
they have the disadvantage of not being able to travel long dis- 
tances igs are not able to cover the ground as rapidly as dogs. 
While ruffles are no doubt often found by accident, unless 
to some scientific expert who will have no trouble in determining 
their identity, since they are easily recognized by their micro- 
scopic characters. FRED J. SEAVER 
NOTES ON AN EXPERIMENT WITH POTASH 
Inquiry having made desirable first-hand information relative 
to the stimulative effect of potash on the growth of plants, inde- 
pendent of other elements, the experiment here described was 
carried out during the past summer and autumn. 
Soil from the experimental garden was taken to a depth of 
126 lbs., and filled the bench to a depth of nearly seven inches. 
he chemicals used were of high grade purity. The amounts 
applied to the various plots were as follows: 
