Transactions . 06 1901 0 1 0 1 2 1 0 0 1 o (J 0 8 163 1902 1 0 2 0 2 0 1 1 2 0 1 0 10 505 1903 0 (J 0 1 0 2 1 0 0 0 1 1 6 218 1904 2 1 0 0 0 0 0 0 0 0 0 1 4 210 1905 0 3 2 4 0 0 2 0 0 1 •) 1 15 282 19(K) 2 3 1 1 (1 0 0 0 0 3 0 0 10 194 1907 3 1 1 0 1 1 0 0 0 0 0 ) 12 888 190S 1 1 1 0 0 0 0 0 0 0 1 1 5 281 1909 3 1 2 3 0 1 1 0 0 4 1 3 19 295 1910 012 4 3 2 1 0 0 0 0 1 1 1 6 4 21 548 Total 15 13 1 11 7 ; 5 5 1 3 11 14 1 16 114 3850t321 % 11 13 11 111 6 14 4 ^ 1 3 10 12 114 • * Average yearly number of explosions,t Average yearly number of lives lost. 90 Earthquakes, Strains and Stresses—Denis
Transactions . 06 1901 0 1 0 1 2 1 0 0 1 o (J 0 8 163 1902 1 0 2 0 2 0 1 1 2 0 1 0 10 505 1903 0 (J 0 1 0 2 1 0 0 0 1 1 6 218 1904 2 1 0 0 0 0 0 0 0 0 0 1 4 210 1905 0 3 2 4 0 0 2 0 0 1 •) 1 15 282 19(K) 2 3 1 1 (1 0 0 0 0 3 0 0 10 194 1907 3 1 1 0 1 1 0 0 0 0 0 ) 12 888 190S 1 1 1 0 0 0 0 0 0 0 1 1 5 281 1909 3 1 2 3 0 1 1 0 0 4 1 3 19 295 1910 012 4 3 2 1 0 0 0 0 1 1 1 6 4 21 548 Total 15 13 1 11 7 ; 5 5 1 3 11 14 1 16 114 3850t321 % 11 13 11 111 6 14 4 ^ 1 3 10 12 114 • * Average yearly number of explosions,t Average yearly number of lives lost. 90 Earthquakes, Strains and Stresses—Denison, westerly swing. These periods are also the times of greatestseismic frequency. The foregoing table shows that during the past eleven yearsthe greatest number of explosions (16) occurred in the month ofDecember, while the least number (1) was reported in August. f8S9 ti */fffanTosititn of t-W Hemtnthf Tendufum. 3 , A^umier of QuakfS T*t9rtft fS7 /^fi £2S2_. «>J In the above diagram the mean annual position of the E-Whorizontal pendulum is given from 1899 to 1910, and under thisis the annual coal mine curve taken from the above table. Beneaththis is the annual number of quakes recorded at Victoria. In comparing these curves it is interesting to note that theyear of the fewest mine , viz., 1904, is also the yearof the smallest number of quakes; while in 1906, the year of onemaxinmm swing of the pendulum, is also the centralyear of three of an abnormal number of mine explosions. Amarked maximum in the quake frequency also occurs in 1906. Earthquakes, Strains and Stresses—Dexison. 91 Another year of few mine explosions, viz. 190S, is also oneof few quakes, and corresponds with the time of a maximumwesterly swing of the pendulum. During the years 1909 and1910 the pendulum steadily moved eastward, and by the closeof the latter it had exceeded its position in 190G. Both the mineexplosions and quake curves for these ye
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