The original crosses were made in the summer of 

 1913. The seeds thus secured were grown together with 

 the parents the following year. In the fall of 1914 

 the seeds of F-r plants were sown in the greenhouse and 

 parent plants were grown under the same conditions to 

 eliminate any chance of change due to environment. In 

 every case a sample head was saved from the parent plants 

 and where possilale seeds of the Fj plants were saved. If 

 this was not practicable photographs were taken so that 

 the record would he complete. 



In June of the summer of 1915 the plants of Fg 

 were harvested, each one separately in order that a study 

 of the various characters might be made on the individual 

 plants. 



Method of Crossing 



The actual method of making the crosses is very 

 simple. Only a fair knowledge of the floral structures 

 is necessary to make the work a success. After working 

 with the flowers for some time, it was found that it was 

 easier to get the pollen from the wheat to pollinate the 

 emmer flowers than to make the reciprocal cross. How- 

 ever, the crosses were made both ways. The head is first 

 prepared for emasculating by removing the lower spikelets 

 and clipping out the top of the head until only eight or 

 ten spikelets remain. The center flower or flowers of 

 the spikelet are then removed with a pair of forceps. In 



