Page 141, 6th line, insert “or air dried” after “moisture.”
Page 141, in example read 10.25, 10.22, 13.07 and 76.21 for 9.52, 9.22, 12.07, and 60.35 respectively.
Page 158, 3d line of 172, insert “and estimating soluble matters therein” after “flow.”
Page 159, omit “√ ” in first formula.
Page 293, 12th line, read “U” for “V.”
Page 309, last line, read “sixth” for “sixteenth.”
Page 312, 1st line, read “atmosphere” instead of “room.”
Page 315, 6th and 7th lines, read 299, and 300, for 294, and 295, respectively.
Page 323, 3d line from bottom, read 301 for 299.
Page 333, 5th line of 316, insert after “is” “to eliminate carbon dioxid and.”