210 



REPORT 1888. 



Let us see, then, -what difference is caused by operating on all 

 Mr. Sauerbeck's forty-five articles instead of only the twenty-one principal 

 items which are common to his price list and ours. He himself at 

 p. 595 (of the ' Jouru. Stat. Soc.,' 1886) gives us the Means of Comparison : 



It is interesting to observe that the Median does not suffer any 

 change by being extended from twenty-one to forty-five articles. The atten- 

 tion of the reader is invited also to the ease of this method. In order to take 



in the twenty-four additional articles we have only to write down a few 

 more figures in the central compartment, to add a few more dots in the ex- 

 treme compartments, as shown in the annexed diagram. Indeed it is not 



