94 
K. Kk. Hydrographisches-Amt. 
direction, N. 29° E. 
The instrument used was a Vicentini microseismograph, three components; mechanical 
registration on smoked paper. 
POLA, AUSTRIA. 
REPORT OF THE CALIFORNIA EARTHQUAKE COMMISSION. 
Prof. Dr. August Gratzl, director. 
Lat. 44° 52’ N.; long. 13° 51’ E.; distance, 88.34° or 9,821 km.; 
chord, 8,877 km. ; 
The seismogram was too faint for reproduction. 
(1) North and (2) east components: 7, 2.24 seconds; V,110; J, 138 meters; e, 1.03; 
r,0.1mm.; M, 100 kg.; ZL, 125 cm. 
(3) Vertical component: 7), 0.92 second; V, 135; J, 29 meters; M, 50 kg. 









Nothing is visible in the vertical component. 
north component was 1 mm. at 14" 04.0". 








First SECOND Eartu’s 
R ie A 3 
Pea romamceenn|i. WAUsacd Eerie) gent gram.) cao 
| m. 8. m 8. m. 8. m. 8. m. 8. mm. sec. mm. 
(1) North component! 25 56 36 138 46 05 54 29 | 09 29 1.6 14 0.5 
(2) East component pena Tey! het it Bex 53 59 | 02 11 2.5 21 1.9 
Average 25 56 36 «13 46 05 54 14 
Interval 13 28 23 45 33 37 41 46 

The greatest earth-amplitude on the 
QUARTO-CASTELLO (FLORENCE), ITALY. 
Dr. Raffaelo Stiattesi, director. 
Osservatorio Geodinamico di Quarto-Castello. 
Lat. 48° 49’ N.; Idng. 11° 16’ E.; altitude, 90 meters; distance, 88.40° or 9,828 km.; 
chord, 8,882 km.; direction, N. 31° E. 
Foundation, directly on Upper Eocene limestone. 
Seismograms, sheet No. 6. 
The instruments used were Stiattesi horizontal pendulums, two components; mechan- 
ical registration on smoked paper. 
(1) North component: 7, 21.4 seconds; V, 50; J, 3,780 meters; M, 500 kg.; L, 
1.80 meters. 
(2) East component: 7T,, 17.4 seconds; V, 50; J, 5,700 meters; M, 500 kg.; L, 1.80 








meters. 
First SECOND Reeauiar | PrRIncrPaAu AMPLI- Eartu’s 
Pepmamonee | cowmmonae fe RAVING | GhEAR' csi] ee gel) awn odch oes oad 
m 8. m. 8. nt nes m 8. min. mm. sec. mm. 
(1) North component | 26 35 37 610 52 3971] 58 36 04 255 + 30 10.2 + 
(2) East component 26 42 36 58 51 24 Sar 07 265 + LG 1.2 + 
Average . 26) 35 sy, (ye a2 OL? 
Interval . 14 10 24 36 39 «sat 




The periods are shown on the seismogram. It is not clear why so large a movement of 
the earth is indicated on the north component. 
The foundation is limestone, and other 
stations, not far distant, record much smaller displacements; and the east component 
indicates an earth-amplitude only about 0.1 as much. This large amplitude can not be 
accepted as true. 
