312 'i'HE DOG IN DISEASE. 



Dislocation (extrusion, protrusion) of the eyeball may 

 result from violence, as fighting, etc. 



If the parts are not clean they should at once be 

 washed with an antiseptic solution, and, by gentle pressure, 

 oiling well with vaseline, returned before swelling and in- 

 flammation have set in. If some time has elapsed, the 

 eye should stiU be pressed back, if possible, before opera- 

 tive procedures are undertaken. 



After replacement the head should be bandaged for 

 a few days, cotton-wool being laid over the eye itself. 

 If there is danger of inflammation, surgeon's lint dipped 

 in the lead lotion referred to previously will tend to 

 soothe. The dressing should, of course, be covered with 

 impermeable material to keep the whole moist. 



Squint can in some cases be remedied by operation, 

 and it may be worth while if the dog be very valuable, 

 though in most instances the services of an oculist will be 

 desirable. 



DISEASES OF THE NERVOUS SYSTEM. 



The nervous system consists of nerve-endings, nerve- 

 fibers, and nerve-cells. The cells alone are capable of 

 originating influences {impulses), or modifying them when 

 carried to them by the conductors or nerves. The nerve- 

 endings are specially modified cells adapted for receiving 

 the stimulus from the outer world. All the sensory or- 

 gans may be regarded as more or less complex combina- 

 tions of nerve-endings. The principal centers are the 

 brain and spinal cord, which in reality are groups or com- 

 munities of organs, just as the alimentary canal is a group 

 of organs, and we must expect to find localization and 



