No. 1 and No. 2 were tried again after intervals of 33 to 48 days. The results of these trials are shown in Fig. 32. Here every millimeter along the base line represents _one_ trial with the ‘no’ signal (the ‘yes’ signals were practically perfect), and failure is represented by a column 10 mm. high while success is represented by the absence of any column. Thus the first record reads, “No. 1 with signal 104 after 40 days made 5 failures, then 2 successes, then 1 failure, then 1 success, then 3 failures, then 1 success, then 1 failure, then 3 successes, then 1 failure, then 10 successes.” The third record (106; 40 days) reads, “perfect success in ten trials.”
[Illustration: FIG. 32.]
