Page:Popular Science Monthly Volume 57.djvu/199

 21 correct 114 fast, average 3 per cent (recording 103 cubic feet for each 100 cubic feet actually passed) ${\displaystyle \scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \ \end{matrix}}\right.}}$ 3 more than 10 per cent 42 between 3 and 10 per cent 69 less than 3 per cent —— 114 52 slow, average 21⁄4 per cent (recording 973⁄4 cubic feet for each 100 cubic feet actually passed) ${\displaystyle \scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \ \end{matrix}}\right.}}$ 0 more than 10 per cent 13 between 3 and 10 per cent 39 less than 3 per cent —— 52 —— 187