SEVENTH ANNUAL REPORT. 117 



was limited if present at all. The tissues from this case were 

 not obtained in absolutely fresh condition, hence I have disre- 

 garded the cytoplasmic alterations of the ganglion cells, their 

 nature indicating that they were probably entirely of post-mortem 

 origin. 



In brief, the lessons found in this doubtful case of cage pa- 

 ralysis consist of areas of neuroglial sclerosis, situated in the 

 lower dorsal and lumbar cord, limited to the columns of Gall 

 and Burdach, with irregularly degenerated fibers in the two pos- 

 terior tracts, both above and below the sites of the chief areas 

 of sclerosis. The fibers of the posterior nerve-roots and the 

 posterior root-ganglia both showed degenerations, but apparently 

 the chief descending tracts of the cord and the anterior nerve- 

 roots were free from disease. 



The blood-vessels, excepting in the sclerosed areas, were found 

 to be normal. 



The lesions in this spinal cord indicate that the disease was 

 very like tabes dorsalis, and the symptoms of the case also re- 

 sembled those of this disease. We do not look on this case as 

 a typical one of cage paralysis, and simply report it as a most 

 interesting observation. 



RECOMMENDATIONS. 



Although great improvements have been made in the Park 

 during the past year there still remain many improvements which 

 must be made, especially for stricter quarantine, and the sooner 

 they are made the cheaper it will prove in the end. I believe 

 that the most important change which can be made in the present 

 management of the Park would be the establishment of a thor- 

 ough quarantine system. 



QUARANTINE. 



The most important function to be considered under this head 

 is designed to prevent the entrances of disease to the Park. Our 

 greatest hopes in the control of the diseases in the Park must 

 chiefly rest on the prevention of the introduction of disease from 

 the outside. Eighteen valuable animals have been lost during 

 the past year to our direct knowledge through the admission of 

 but two diseased animals. We can form no idea as to how far 

 our deaths from tuberculosis have been due to the importation 

 of tubercular animals, particularly monkeys. Furthermore, un- 

 less more rigorous measures are introduced soon there is no tell- 

 ing when rabies, distemper, tuberculosis, anthrax, actinomycosis 



