■658 KANSAS CITY REVIEW OF SCIENCE. 



brain or the blood with virus, produces hydrophobia in the course of six to ten 

 days and invariably fatal. 



Hydrophobia induced by the injection of the virus in the blood, produces 

 not the same symptoms as the malady resulting from the direct bite of a mad 

 dog, or inoculating the surface of the brain. In the first case, the spinal mar- 

 row is immediately attacked. When a dog is inoculated and does not succumb, 

 that does not prevent the animal from, later, contracting the disease. Pasteur 

 records the spontaneous cure of hydrophobia after the first rabic symptoms were 

 developed, but never after the acute symptoms set in. Cases have occurred, of 

 the complete disappearance of the first symptoms and the development after two 

 months of the acute symptoms, terminating fatally. In 1881, Pasteur inoculated 

 three dogs, two died rapidly of madness, the third displayed the symptoms of the 

 first stage of the malady, but nothing since, and though inoculated twice in 1882, 

 by the brain, the animal never contracted the disease. This is an important 

 factor in the road of prevention against hydrophobia. In the laboratory, there are 

 also three other dogs to which the madness cannot be communicated, no matter 

 how they may be inoculated. The aim of all the experiments is to discover a 

 method to preserve dogs against hydrophobia, and so render their bites harmless 

 to man. Pasteur does not despair of attaining this end. The brain of a cow, 

 dead from hydrophobia contracted from the bite of a dog, communicated, by in- 

 oculation, death to all the animals operated upon. M. Pasteur has experimented 

 on no less than 200 dogs, rabbits, and sheep; they have so far only thrown a brillr 

 iant light on the road to the solution of a terrible disease which never forgives. 

 Within two years that desired solution has made more progress than it has within 

 centuries. 



The following is a simple and ingenious plan for utilizing the electric, which 

 now supersedes the ordinary, bells in houses, and to convert them into clocks, 

 to chime or strike, following the parent time-piece. The latter can be of any 

 model provided it strikes or chimes. Attach the end of the negative wire of the 

 electric gong to the metallic works of the clock, then arrange the positive wire 

 with the hammer, that is, a little above it : when the hammer rises to strike the 

 bell, it will touch the wire, the "circuit" will be thus interrupted, the current 

 will pass, and will travel along the wires to set the electric gongs to tint. The 

 tinting will be repeated as many times as the hammer of the clock rises, and 

 touches the wire in its proximity. Every room, corridor, or passage, of a house, 

 can thus be simultaneously informed of the exact hour by the mother clock. 



Relative to time, the 21st of December is the winter solstice, and the days 

 are the shortest of the year. The Sun, as is well known, cuts the day in two 

 equal parts, by arriving at noon at the meridian. But if an almanac be consulted 

 it will be seen, that on the ist of December, the Sun rises at yh. 34m., and sets 

 at 4h. 4m,; the 15th of December, it rises at yh. 49m. and sets at 4h. 2m.; the 

 31st of December it rises at yh. 56m. and sets at 4h. iim. Thus the days di- 

 minish during the forenoons throughout the month, while they augment during 



