32 COGOTN BROWN : THE BURMA EARTHQUAKES OF MAY 1912. 



between standard time and local time (?). Neither the post office 

 clock nor the one in his private quarters stopped. They were both 

 in the same position, namely, with the pendulums swinging N. E. — 

 S. W. He was in the compound when the main shock occurred. It 

 appeared to come from the E. but he was too frightened to make 

 any further observations. 



Mr. '/. Owen, Deputy Superintendent, Mandalay Signal Office. — He 

 was at Maymyo when the earthquake took place at 8-55 a.m. by 

 his watch. It is not stated whether this was compared with any 

 standard time or not. 



Dr. A. M. F inlay son, Geologist, The Indo- Burma Petroleum Co., 

 Maymyo. — Time 8-57 a.m. on May 23rd, lasting over 1 minute. 

 The first sensation to persons outside was the sudden sharp rattling 

 of leaves on trees. Inside brick bungalows, closed windows com- 

 menced rattling, the rattle quickly increasing to a maximum in a 

 little over 30 seconds. Walls and floors moved ; during the maxi- 

 mum the ground was moving gently, and a slight rumbling occurred. 

 After the sudden rise the shock died off more slowly. It was 

 followed by minor tremors for the rest of the morning. 



Unstable or top-heavy articles such as lamp-glasses, wine glasses 

 (not inverted) were overturned. Some hanging lamps were thrown 

 out of their supports. Brick chimneys were in some cases not visibly 

 affected, in others cracked, and in several bungalows, crashed through 

 the ceiling. Plaster was freely broken away at corners and along 

 joints, and bricks were occasionally loosened. In a few bungalows 

 brick dividing walls were severely shaken and damaged. Outer 

 walls were apparently less affected. In .Messrs. Steel Bros, bun- 

 galow, "Churchill," windows facing E. and W. rattled backward 

 and forwards in their settings, while windows facing N. and S. were 

 much less affected. Hanging lamps swung Iv \V. The \V. wall was 

 observed at the maximum to bulge out and recede several times. The 

 E. wall also similarly moved. A heavy two-leaved folding table 

 leaning against an E. wall at an angle of 12° from the vertical, was 

 thrown to the floor. A few sudden vibrations would doubtless cause 

 this and the movement indicated was probably a result of the sharp 

 shock ; it would scarcely be a measure of intensity or amplitude 

 of wave motion. Dr. Finlayson also gives a valuable list of after- 

 shocks which will be referred to later. He is of the opinion that 

 the Rossi-Forel scale cannot be applied with much satisfaction 

 to the effects at Maymyo. Most of the after tremors would fal) 



