20 MASS. EXPERIMENT STATION BULLETIN No. 282 



slightly more than one cent in price. This may be interpreted to mean that for 

 each }/§ inch additional air space per egg, prices on the average drop one cent 

 per dozen. If all twelve eggs in a dozen showed M inch air space instead of J^ 

 inch, prices in November would be more than 12 cents below the average. This 

 varies somewhat between eastern and western eggs and between chain and 

 private stores. In November the drop in price in chain stores for increasing air 

 space was appro.ximately 63.63 per cent higher than the drop in private stores. 

 In April, air space is relatively unimportant as compared with weight. The 

 average for all stores shows a net drop of 3 cents per dozen for each unit increase 

 in air space score, or yi of one cent decrease for each Y^ inch increase in size of 

 air space in each egg. Relatively, then, air space has about one-fourth as much 

 significance during a period of low prices as during a period of high prices. 



Table 14. — Regression Coefficients Between Internal Qualitv Scores 

 (including weight) and Price 



April August November 



Air Space 



All Eggs -.265 



All Eggs (omitting weight) -.446 



Chain Stores -.222 



Private Stores -.024 



Eastern Eggs +.068 



Western Eggs -.021 



Yolks 



All Eggs -.479 -h.l92 +.027 



All Eggs (omitting weight) -.479 -.068 



Chain Stores -.021 +.116 -.176 



Private Stores -.762 +.091 +.373 



Eastern Eggs -.852 -.105 +.643 



Western Eggs -.274 +.431 +.033 



Whites 



All Eggs 



All Eggs (omitting weight). 



Chain Stores 



Private Stores 



Eastern Eggs 



Western Eggs 



Weight 



All Eggs +2.424 +4.461 +3.180 



All Eggs (omitting weight) 



Chain Stores +1.873 +4.278 +2.258 



Private Stores +2.819 +4.481 4-3.592 



Eastern Eggs +2.444 +2.313 +3.015 



Western Eggs ^1.461 +2.672 +2.522 



During August, when quality is relatively poor, air space again assumes a 

 prominent part in determining price, standing next to weight. For eastern eggs 

 it is more significant than weight. Air space is relatively twice as important in 

 determining price in private stores as in chain stores during August. In general 

 the average for all stores shows a decrease in price of }/^ oi & cent for each egg 



