Hours. Five. Twenty-one. Five. Twenty-one N. O. N. O. V. M. V. M. Series _S._ C^{1-4} 1 3 1 1 0 1 0 1 C^{5-8} 0(1) 3 0 2 0 1 0 1 C^{9-12} 0(1) 3 0(1) 4 3 4 3 4 C^{13-16} 1 3 1 3 2 3(1) 3 3(1) Total 2(2) 12 2(1) 10 5 9(1) 6 9(1) Per cent. 14 75 14 63 33 60 40 60 _Hn._ C^{1-4} 1 4 1 4 0 4 1 4 C^{5-8} 0(2) 1 0(2) 1 0(1) 2 1(1) 2(2) C^{9-12} 3 4 3 4 2 4 2 4 C^{13-16} 1 3 3 3 0 3(1) 0 2(1) Total 5(2) 12 7(2) 12 2(1) 13(3) 4(1) 12(3) Per cent. 36 75 50 75 14 100 29 92 _B._ C^{1-4} 3 4 3 4 3 4 3 4 C^{5-8} 3 2 3 3 2 2 2 4 C^{9-12} 2 4 2 3 2 1 2 2 C^{13-16} 3 4 3 4 2 4 2 4 Total 11 14 11 14 9 11 9 14 Per cent. 69 88 69 88 56 69 56 88 _Ho._ C^{1-4} 3(1) 2(2) 3(1) 2(2) 0 3(1) 0 1(1) C^{5-8} 3(1) 4 3(1) 4 3 3(1) 3 3(1) C^{9-12} 1(2) 4 1(2) 4 2(1) 3(1) 2(1) 3(1) C^{13-16} 0 2 0 2 2 4 2 4 Total 7(4) 12(2) 7(4) 12(2) 7(1) 13(3) 7(1) 11(3) Per cent. 58 92 58 92 50 100 50 85 The object series were also changed to conform to the movement series. Formerly the objects had been shown successively through the aperture and synchronously with their corresponding words; now they were on the table in front of the subject and all uncovered and covered at once as in the movement series. The subjects therefore had a single mental image of these four objects also. In both the object and the movement series the objects as before were small and fairly uniform in size and so selected as not to betray to the subject their presence beneath the cloth in the I. test. In the II., III. and IV. tests there were no objects on the table. The previous table shows the results of the _C_ set. The figures give the number of couplets correct out of four; the figures in brackets give the number of indirect associations; the total number recalled in any series is their sum. In the following summary the recall of _M_ and _Mo_ after two days and of _S, Hu, B_ and _Ho_ after twenty-one hours are combined.