SHORTER ARTICLES AND DISCUSSION 



A SYSTEM OF RECORDING MENDELIAN 

 OBSERVATIONS 



In any experimental investigation the importance of making 

 full, definite and at the same time simple and easily understood 

 notes can hardly be overestimated. To record all pertinent ob- 



least expenditure of time and energy should be the object of the 

 observer. 



In connection with some investigations in plant breeding at 

 the Massachusetts Experiment Station a system of records has 

 been devised for use in experiments where segregation of char- 

 acters occurs that has worked very well in practise and may be 

 found suggestive to other observers who are investigating Men- 

 delism and handling a considerable number of plants. 



The records are kept on 5 X 8 index cards, though 4X6 

 cards might be preferred by some. All observations pertaining 



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