2l8 MAINE AGRICUI.TURAL EXPERIMENT STATION. 19II. 



Stated that the seed tubers of this variety were in very poor 

 condition when he received them, and he only planted them in 

 order to get a start with this variety. He exposed them to 

 formaldehyde gas for the same length of time as his other 



Tabular Summary. 



Experiment. 



Variety. 



Condition of 

 Seed. 



Treatment. 



No. diseased 

 plants per A. 





Green Mountain . 



Selected 





87 





Formaldehyde solution 







Donaldson . . . 



Irish Cobbler . , . 



Bruised. 



Selected 



None 



70 





Formaldehyde solution 



20 

 10 





Formaldeh5'de solution 







Hussey 



Irish Cobbler 



Green Mountain . 



Selected 



Not selected . . . 





0* 



Formaldehyde solution 



0* 

 163 





Formaldehyde solution 







Porter 



Irish Cobbler 



Not selected . . . 



Selected 



Small, inferior . 



None 24 



Formaldehyde solution||f 4 



None 



Formaldehyde solution 1 

 Formaldehyde solution ' 20 



Good 



Irish Cobbler. . . . 



Not selected . . . 



None 



Formaldehyde solution 



53 

 5 





Irish Cobbler 



White Rose 



Not selected . . . 





0* 





Formaldehyde gas .... 



None 



Formaldehyde gas .... 



0* 

 390 

 150 



Blake 



Irish Cobbler .... 



Selected 



Formaldehyde solution 

 Formaldehyde gas .... 



0** 

 0** 



Edblad 



Irish Cobbler 



Green Mountain . 



Early Rose 



20th Century 



Not selected . . . 



None 



Formaldehyde gas 



96 

 0*** 

 0** 

 18** 

 40** 













* Seed used was apparently not diseased in the beginning. In the Hussey experi- 

 ment it had been eliminated through treatment the year before. 



** No satisfactory check plot of the variety available for comparison. 

 *** See note on page 217. 



varieties to obtain what beneficial effects that he could from 

 the treatment. He did not, however, select out and plant only 

 the perfect tubers and did not save a check plot planted with 

 untreated seed. 



