BABIES. 245 



per cent, between the second and third day; 33 per cent, between 

 the fifteenth and thirtieth day; 19 per cent, between the thirtieth 

 and forty-fifth day; 10 per cent, between the forty-fifth and six- 

 tieth day; 16, 18, and 10 per cent, over three months. The 

 longest period of incubation was observed by Leblanc; this case 

 developed in 364 days. In the human race it is generally admitted 

 that the average period of incubation is seventy-two days (this 

 average covers over 510 cases). 



During the period of incubation nothing abnormal may be 

 observed in the affected animal, but Hogyes, Babes, Ferre, and 

 others have observed in rabbits which were inoculated with virus 

 a slight increase of temperature on the fourth or fifth day, and 

 Babes has noted that the time this fever is observed there are no 

 nervous symptoms presented, the animals remaining healthy for 

 weeks until finally the disease appears. 



There are two forms of rabies — a furious and quiet (or dumb) 

 form. Both forms are fatal. 



Furious Rabi€S. This comprises three distinct stages, namely, 

 the melancholic, the irritating, and the paralytic stage. 



In the melancholic stage the dogs seem to change in their dispo- 

 sition. They are capricious, irritable or depressed; are easily an- 

 gered and excited, fretful, and rarely affectionate. They soon show 

 a tendency to gnaw or swallow indigestible substances, and may 

 refuse their usual food; will lick and gnaw in a greedy manner 

 various objects, such as wood, coal, furniture, and eat straw, earth, 

 stones, wood, blankets, and even their own feces. The sexual ex- 

 citement is much increased ; in the first stage an uncertainty in the 

 gait and a weakness in the hind-quarters is seen. After one to 

 three days, the second or maniacal stage appears, characterized by 

 a tendency to escape and run away, great irritation and inclination 

 to bite animals, objects, or man; or a strange alteration in the 

 voice, or bark. 



The inclination to run off is very marked. They will run about 

 aimlessly, and return in one or two days, showing every indication 

 of great excitement or of having travelled long distances. During 

 this condition they bite any object that comes in their way. Soon 

 the delirium increases and they run around in an insane way, at- 

 tacking and biting anything that is within their reach. They may 

 tear or mutilate their own bodies-, particularly their toes. The 



