Figure 4. Experimental Cabbage Field at Waltham on June 1, 1942, showing alternate 

 rows of cabbage plants pulled for examination of maggot injury to the roofs, as described on 

 page 8. The plants in the rows not pulled received the same treatment as those in the rows 

 of pulled plants on their right, and were grown to maturity for data on head development. 



Photo by W. E. Tomlinson, Jr. 



