14 Canadian Record of Science, 



11 5. Which of the following measures of intensity would 

 best describe what happened in your vicinity ? — No. 1. Very 

 light; noticed by a few persons; not generally felt. No. 

 2. Light; felt by the majority of persons; rattling of win- 

 dows and crockery. No. 3. Moderate ; sufficient to set sus- 

 pended objects, chandeliers, etc., swinging, or to overthrow 

 light o bjects. No. 4. Strong ; sufficient to crack the plas- 

 ter in houses or to throw down some bricks from chimneys. 

 No. 5. Severe; overthrowing chimneys and injuring the 

 walls of houses. 



" 6. Do you know of any other cause for what happened 

 than an earthquake ? Give also any further particulars of 

 interest, stating whether they are from observation or hear- 

 say : for instance, whether the shock seemed like a tremor 

 or jar, or an undulatory movement ; and whether it seemed 

 to come horizontally or vertically ; whether any idea of 

 direction of shock was formed, and if people agreed in their 

 idea as to such direction. Mention any unusual condition 

 of the atmosphere ; any strange effects on animals (it is 

 often said that they will feel the first tremors of a shock 

 before people notice it at all) ; character of damage to 

 buildings ; general direction in which walls, chimneys, etc., 

 were overthrown. Springs, rivers and wells are often 

 noticeably affected by even slight shocks, and such facts 

 are especially interesting. If a clock was stopped, give the 

 time it indicated, and some idea as to how fast or how slow 

 it was, its position, the direction in which it was standing 

 or facing, and the approximate weight and length of the 

 pendulum. If a chandelier was noticed to swing decidedly, 

 describe it and state direction of swing, if pictures swung, 

 state direction of wall, and whether pictures on the wall at 

 right angles to it were also put in motion. If doors were 

 closed or opened, state the direction of the wall in whi h 

 they were set. All such little facts, if noticed, remem- 

 bered and recorded, are of great value." 



By attending to these directions, persons of ordinary ob- 

 servation, and without the aid of instruments, may contri- 

 bute valuable information, which, if sent to the editors of 



