years after his birth in 1564. His birth might also be
remembered as occurring in the same year as that of the great astronomer
Galileo. The fourth Folio appeared in 1685 or 21 years after the third
Folio. This period measures the years that bring man's majority or full
age.

Attention to the facts of reading will be secured by increased power of
Concentration, and a familiarity with In., Ex., and Con. will enable us
to assimilate all dates and figures by numeric thinking with the
greatest promptitude, especially the longer or larger series.

Try the case of Noah's Flood, 2348 B.C. Here the figures pass by a unit
at a time from 2[3] to 4, and then by doubling the 4 we have the last
figure 8--making altogether 2348. Another method of dealing with this
date is very instructive. Read the account in Gen. ch. vii., vv. 9, 13,
and 15. Now we can proceed.

They went into the Ark by _twos_. This gives the figure 2. Now let us
find the other figures. Noah's three sons and their wives make three
pairs of persons, or _three_ families. This gives the second figure 3.
Then counting Noah and his wife, and his three sons and their wives,
there were four pairs of human beings altogether. This gives the figure
4. Finally the total number of human beings who entered the ark were
4 pairs or _eight_ persons. This gives the figure 8. Thus we have the
entire set of figures, 2348 B.C. Take the date of the creation
according to the accepted biblical chronology as 4004 B.C. We could say
the date has _four_ figures, that the expression of it begins and ends
with the figure 4, and that the two intermediates are nought, or
cyphers; or that the figures are expressed by 40 and _forty reversed_ as
40-04--or 4004.

A SCIENTIFIC EXPERIMENT.

Having met several persons who claimed that they always remembered
figures by reasoning about them [whatever that may have meant], and yet
all such persons having shown an inability to remember many dates or
numbers, I inferred that they were honestly mistaken in supposing that
they could remember numbers, or else that such a method was not adapted
to their idiosyncrasies. At that time, I did not suspect that their
failure may have arisen from lack of _training_ in In., Ex., and Con.
From the circumstance that I myself could use this method with
promptitude and certainty, I determined to test it in a strictly
scientific way.

I made the experiment two years ago, and all my experience since has
corroborat