THIRTEENTH ANNUAL REPORT 13 



have yielded promising results. In connection with the division 

 of organic chemistry an investigation is now being conducted 

 with a view to obtaining an active principle from chaulmoogra 

 oil. Dr. John A. Johnston, of this Bureau, was appointed by 

 the Secretary of the Interior as chairman of a committee to in- 

 vestigate a treatment for leprosy, and this work is still in 

 progress. 



Plague. — The routine work during the calendar year in ex- 

 amining 113,337 rats for plague has been enormous, and some 

 facts previously unknown have been discovered. The routine 

 examinations have served to confirm previous investigations of 

 this laboratory with regard to plague. 



Pathology. — The pathologist has performed 412 autopsies dur- 

 ing the calendar year, mostly as diagnostic measures for the 

 Bureau of Health. These have included such diseases as Asiatic 

 cholera, bubonic plague, beriberi, malaria, tuberculosis, glanders, 

 entamoebic and bacillary dysenteries, leprosy, diphtheria, tetanus, 

 various tumors, and cases of trauma. Pathological specimens 

 from the Philippine General Hospital, Bureau of Health, and 

 from physicians in private practice to the number of 609 have 

 been examined. 



Sera and vaccines. — The following preparations were kept in 

 stock and prepared in quantities sufficient to meet the demand : 

 Antirinderpest serum, antidiphtheritic serum, antitetanic serum, 

 anticholera serum, antiplague serum, antistreptococcic serum, 

 serum for exophthalmic goitre, and normal horse serum. Other 

 normal sera were furnished on request. In November, 1913, 

 antimeningococcic serum was added to the list. Variola vaccine, 

 mallein, plague vaccine, cholera vaccine, gonococcus vaccine, sta- 

 phylococcus vaccine, typhoid vaccine, streptococcus vaccine, 

 dysentery vaccine, anthrax vaccine, B. coll vaccine, tuberculin, 

 and autogenous vaccines were furnished on request. 

 , From July 1, 1913, to December 31, 1914, inclusive, 1,882 

 serum tests for syphilis were made and 398 specimens of blood 

 were examined bacteriologically. 



Rabies. — The work on rabies was continued and 163 patients 

 received the Pasteur treatment. 



ULTRA-VIOLET RAYS WATER-STERILIZING APPARATUS 



The Bureau of Science purchased for the city of Manila a 

 plant, consisting of one ultra-violet rays water-sterilizing appa- 

 ratus type C-3, complete, with automatic valve and lamp and 

 one rotary converter, with variable speed 110-volt direct current 

 motor and generator field regulation, to deliver direct current 



