Brinton, Willard Cope, 1880- · New York, The Engineering magazine company · leaf 157
140 GRAPHIC METHODS paper was used for a background. The upper half of the chart shows the 24 hours of the day divided between hours of darkness, hours of twihght and cloudiness, and hours of sunshine, totaling 100 per cent for each month in the year. The hours of darkness are definitely known from… … New York Edison Company Fig. 127. Industrial Accidents in Different Months of the Year Compared with the Hours of Stm- light Each Day in Different Months According to Weather Records for New York City in 1 9 1 o Twenty-four hours in a day are shcmi as 100 per cent divided between darkness,…
Graphic methods · Statistics
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