Note 421 — Chapter XIX

This is strictly true only of the part of T which comes from the figure for M´V´, 353 billions. In calculating MV, Professor Fisher introduces more complexities, into which we shall not enter, as the absolute amount is small—only 34 billions!—and the possible error from this source not great enough to affect a calculation where 20 billions one way or the other is within the "margin of error."