EXERCISE L. 

 SEASONAL FLUCTUATION IN THE PRICE OF AGRICULTURAL 



PRODUCTS. 



Supplies for a Laboratory Section of Twelve. Red ink and blue ink. 



1. A study of the seasonal supply and price of eggs will illustrate many of the factors 

 which affect market prices of agricultural products. 



The following table shows the approximate dates and prices of eggs of the "prime first" 

 class on the Chicago market, March 1, 1910, to February 28, 1911. Transfer this data to a 

 sheet of graph paper as suggested by tlie following: First, turn the paper with the broad side 

 toward you. Second, let each centimeter at the base of the sheet represent a month of the 

 year. Let Marcn be the first month. Third, let each centimeter vertically along the left hand 

 margin represent five cents in value. Fourth, transfer the data below to the graph paper by 

 placing a dot at the place that most nearly coincides with the date and price given. Fifth, after 

 transferring all data to the graph paper, connect the dots by a smooth curve drawn in red ink 

 or with a red pencil. 



Approximate Prices of Eggs in Chicago, 1910-1911. 



• 



March 1 .* $0.26 September 31 $0.24 



March 31 21 October 31 27y 2 



April 30 .20 November 30 31 



May 31 19 December 31 ZlVi 



June 30 18 January 31 25 



July 31 1754 February 28 17 • 



August IS 20 



The graph for the price of storage eggs may be shown by a broken red line drawn on the 

 same sheet of graph paper. 



Storage Eggs in Chicago Market 



November 1 $0.24 January 31 $0.12*4 



December 1 23 February 14 11 



December 31 22 February 28 12 



January 15 22 



Draw a third graph on the same sheet showing the quantities of eggs coming into Chicago 

 during this period, March 1, 1910 to February 20, 1911. 



In drawing this graph let each centimeter vertically represent 25,000 cases of eggs. The 

 months will remain unchanged. The line for this graph may be drawn in blue ink. 



Supply of Eggs on Chicago Market 



March 1, 1910-Feb. 20, 1911. 



Cases Cases 



March 1 45,000 September 30 37,000 



March 31 75,000 October 31 25,000 



April 15 198,000 November 30 12,500 



May 15 125,000 December 31 10,000 



June 15 100,000 January 31 25,000 



July 15 75,000 February 20 50,000 



August 24 , 50,000 



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