272 Physiology. 



alleys of our towns and cities. All Arctic explorers now 

 know this danger and avoid the use of alcohol. 



Alcohol and the Sense of Sight. It takes very little 

 alcohol to dull the sense of sight. No hunter or marksman 

 would think of taking alcohol before attempting accurate 

 shooting, for alcohol blunts vision as well as makes the 

 muscles unsteady. Alcohol often causes the person to 

 "see double," because alcohol interferes with uniting prop- 

 erly the images formed in the two eyes of the one object. 

 No one whose work calls for accuracy of sight can take 

 alcoholic drinks without interfering with his business. 



Alcohol and Railroad Men. Probably in no business is 

 it more important that the senses should be alert and 

 keen than in the railroad business. Railroad men must 

 watch for signals and read orders constantly. And on 

 the accuracy and care with which they get these signals, 

 and the faithfulness with which they obey these orders, 

 depend the lives of all who travel on railway trains. 

 Especially is this true of the engineer, on whose clear sight 

 and acute hearing, on whose sound judgment and prompt 

 action in a crisis, so many lives depend. Everybody 

 rejoices that the railway companies are each year 

 becoming more strict in their rules as to the habits of 

 trainmen. 



Alcohol and the Sense of Hearing. Alcohol blunts the 

 sense of hearing. Many an intoxicated man, staggering 

 along a railway track, fails to hear a train that he would 

 easily have heard when sober, and is run over and killed. 

 When bystanders call to him, he fails to hear or does not 

 understand ; so their effort to save him is useless, because 

 he has, for the time, lost his sense of hearing. 



