300 REPORTS ON THE STATE OF SCIENCE, ETC. 
Notes To 1925. 
Jan. 28d. 18h. Focal depth +0-:010. See shock 30d. 17h. Should the 
T be increased by 30s. ? 
Feb. 9d. 5h. Residuals suggest an origin further N. 
Feb. 9d. 14h. See note in Summary, p. 43. 
Feb. 10d. 8h. 10h. 12h. 21h. Epicentre —21-0° +171-5° was computed, but 
the old epicentre was retained. 
Feb. 18d. 11h. An alternative solution is given. 
Mar. Id. 2h. Focal depth +0:010. Felt in Canada and the Eastern 
States. See papers by E. A. Hodgson, also Four. Roy. Astron. Soc. Canada, 1928, 
October. 
Mar. 16d. 10h. Note in Bull. Volcan. nos. 9 and 10 (1926), p. 226. 
Mar. 16d. 14h. Many large negative residuals, especially in S. near A =30°. 
Mar. 25d. 12h. Should T, be increased by 30s. ? 
Apr. 12d. 19h. An alternative solution is given. 
Apr. 16d. 19h. There are a number of records 29m. later than Ty, which may 
belong to another shock. 
Apr. 25d. 13h. It seems possible that this may be two shocks. 
Apr. 26d. 8h. An alternative solution is given with high focus —0-030. 
May 5d. 18h. See Bull. Seis. Soc. Amer., vol. xvii, no. 3, p. 147. 
May 23d. 2h. See investigation by K. Suda, Seis. Bull. Imp. Marine Obs. 
and Kobe Meteor Obs., Kobe, Japan, vol. i, no. 3, Oct. 1925; also T. Matuzama’s 
paper in Bull. Equake. Res. Inst., Tokyo, vol. v. 
May 27d. 20h. ‘There is some evidence of this being a double shock. 
June 21d. 3h. An origin —0-5° would fit the records better. 
June 28d. th. See investigations by P. Byerly, Bull. Seis. Soc. Amer., vol. xvi, 
no. 4, 1926. 
July 7d. 8h. The effect of this shock is masked by the one following. 
Aug. 11d. 17h. +-2°—12° would suit some stations better. 
Aug. 12d. 6h. Note on possible high focus. 
Aug. 26d. 16h. D should read +0-995 and E +0:105. 
Sept. Ild. 4h. 6h. 9h. De Bilt gives +45-2° +14-7° for shock I. and +45-0° 
+14-9° for shock II. III. is entered tentatively. 
Sept. 14d. 9h. Several assumptions of an error of 1 min. must be made if 
this is to be regarded as a repetition of Sept. 1d. 
Sept. 24d. 13h. Some readings suggest at least two shocks, separated by 
about 20s. 
Sept. 25d. 8h. The position —5-6°+102-3° deduced from the residuals 
would suit the observed times better. 
Sept. 29d. 17h. Note and alternative solution given, the alternative gives 
+0-005 deep focus. 
Oct. 13d. 17h. Focal depth +0-005. See note in Summary, p. 266. 
Oct. 25d. 4h. It is not easy to reconcile the observations. 
Oct. 30d. 11h. Alternative epicentre given. 
Nov. 13d. 12h. Some stations indicate a T) about 20s. earlier: see note to 
Nov. 14d. (8h. 10h. 14h.). 
Nov. 14d. 8h. 10h. 14h. All three shocks, stations within 45°, indicate T, 
about 20s. earlier. See shock Nov. 13d. 12h. 
Noy. 16d. 11h. Some indication of a focal depth. 
Dec. 6d. 16h. Probably a double shock. See note in the Summary, p. 305. 
Dec. 10d. 16h. 20h. Only the earliest record, which may be P, is given for 
each station. 
Dec. 18d. 18h. Focal depth +0-030. See note in Summary, p. 310. 
Deep focus has also been applied to the following quakes : 
Jan. 30d. 17h. +0-010. Mar. 8d. 11h.+0-030. Mar. 15d. 13h. and 15h. 
+0-015. Mar. 21d. 15h. +0-010. Mar. 26d. 10h. +0-040. Mar. 29d. 2th. 
+0-010. Apr. 19d. 15h. +0-045. May 14d. 7h. +0-020. May 15d. 18h. +0-050. 
May 27d. 2h. +0-050. June 7d. 23h. +0-045. June 20d. 13h. +0-040. 
June 23d. 16h. +0-025. Sept. 23d. 20h. +0:020. Oct. 5d. 4h. +0-020. 
Oct. 20d. 9h. + 0-050. 
A list of readings from Hukuoka received too late, will be found on p. 323. 
