This chapter is largely hased on an article prepared at the suggestion of the author by Mr. Pierpont V. Davis, of New York City, and published by Mr. Davis in Moody's Magazine.

GRAPHIC METHODS

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Chapter XVI GENERAL METHODS

THERE are a number of comparatively little known short cuts and convenient methods available in the collection and recording of statistical facts. If obsolete or unsuitable methods are used it may make a difference between success and failure in the work of keeping records of any complex business. When the methods of tabulation are too laborious, not only are the records so extensive as to be in disfavor, but they may occasionally include errors, in spite of the greatest care that can be taken by even the highest grade of employees. Anything which will reduce the amount of mental concentration necessary on the part of persons collecting and tabulating facts, will ordinarily assist in the production of more accurate final results. In large statistical studies, such as are made by the United States Census Office, it would be practically impossible to get all the information now obtained if tabulating machinery were not brought to the aid of the human brain and hand.