TIME RECORD OF Hu.

Series.        Im.  Rec.      Two Days.      Nine Days.      Sixteen Days. 
B^{1-4}       Feb. 12      Feb. 14       Feb. 21        Feb. 28
B^{5-8}       Feb. 19      Feb. 21       Feb. 28        Mch. 7
B^{9-12}      Feb. 26      Feb. 28       Mch. 7         Mch. 14
B^{13-16}     Mch. 5       Mch. 7        Mch. 14        Mch. 21

The two half-hours in a week during which all the work of one subject was done fell on approximately the same part of the day.  When a number of groups of 4 series each were to be tested on a given day they were taken in the order of their recency of learning.  Thus on March 7 the order for Hu was B^{13-16}, B^{9-12}, B^{5-8}.

Henceforth there was also rotation within a given four series.  As there were always sixteen series in a set, the effects of practice and fatigue within a given half-hour were thus eliminated.

In the following table the results of the B set are given.  Its arrangement is the same as in Table 1., except that the figures indicate the number of absent terms correctly recalled out of four couplets instead of seven or five.  Where blanks occur, the series was discontinued on account of lack of recall.  As in Table 1., the tables in the first, third and fifth columns show successive stages of the same series.  Immediate recall is omitted because with rare exceptions it was perfect, the test being given merely as an aid in learning.

TABLE II.

SHOWING RECALL AFTER TWO, NINE, AND SIXTEEN DAYS.

Days.      Two.        Nine.    Sixteen.     Two.         Nine.    Sixteen. 
N.    O.   N.    O.   N.   O.   V.    M.    V.    M.   V.   M.
Series.                         M.
B^{1-4}    2(1)  4    1(1)  2    1(1) 2    4     4     4     2    4    2
B^{5-8}    3     1    2     1    1    1    2     2     2     1    1    1
B^{9-12}   2     3    0     3    0    2    3     2     2     0    2    2
B^{13-16}  2(1)  3    2(1)  0    2(1) 0    1     2     1     0    1    0
Total      9(2) 11    5(2)  6    4(2) 5   10    10     9     3    8    5
Per cent. 64    69   36    38   29   31   63    63    56    19   50   31

S.
B^{1-4}¹   0     2    0     0              0     1     0     1
B^{5-8}    0     0                         0     0
B^{9-12}¹  0     1    0     0              0     1     0     0
B^{13-16} squared 0(2)  1    0(2)  1    0(2) 1    0     0(1)  0     0(1) 0    0(1)
Total      0(2)  4    0(2)  1    0(2) 1    0     2(1)  0     1(1) 0    0(1)
Per cent.  0    25    0     6    0    6    0    13     0     7    0    0

Hu.
B^{1-4}    1(1)  4    0(1)  1    0(1) 2    1     3     0     2    0    0
B^{5-8}    0     1(1) 0     0(1) 0    0(1) 0     1     0     1    0    1
B^{9-12}   0     1    0     0    0    1    0     0     0     1    0    0
B^{13-16}  0(1)  0    0(1)  0    0(1) 0    0     4     0     0    0    0
Total      1(2)  6(1) 0(2)  1(1) 0(2) 3(1) 1     8     0     4    0    1