84 



produce plants in respect of each of the six methods of 

 planting : 



M. Girard points out that on comparing these mean 

 figures with the particular figures relating to each 

 variety, the difference between the former and the 

 extreme figures is so slight that the mean may be 

 regarded as conveying in this instance a very fair idea 

 of the actual facts. 



He thinks, therefore, that the experiments have 

 shown that 



1. The maximum crop is obtained by planting entire 

 tubers of medium weight. 



2. The crop is diminished about 30 per cent, if such 

 tubers are cut into two portions. 



3. The crop is diminished, with rare exceptions, 

 about 20 per cent, by planting cut seed, weighing 

 8 J ozs., from whole tubers weighing 7 ozs. or 10J ozs. 



4. If two or three small tubers, weighing in all 

 8 J ozs., are planted together, the crop is, on the 



