234 Horses on Board Ship. 



horses in badly ventilated positions, but also 

 those in places which have the freest possible 

 ventilation, such as stalls facing large open 

 ports on the windward side of the ship. My 

 own experience and that of others leads me 

 to conclude that this aggravated form of 

 pneumonia never appears except under con- 

 ditions of overcrowding. Therefore I am 

 inclined to regard it as a contagious disease 

 which assumes a peculiarly virulent type on 

 account of unsanitary surroundings. Horses 

 fresh from grass often suffer from a somewhat 

 similar, though very much milder, disease, 

 when placed in heated and badly ventilated 

 stables on land. I believe that I am cor- 

 rect in saying that this board-ship form of 

 pneumonia is generally complicated by 

 pleurisy. I have seen it break out among 



