I9I5] /. Bronfenbrenner, J. Rockman and W. J. Mitchell, Jr. 85 



the tuberculous process does not induce Symptoms enough for clin- 

 ical diagnosis. A positive serum test in such cases may indicate 

 its extreme diagnostic value. Although urinary findings in these 

 II cases were all negative, with the exception of one, which was 

 a case of typhoid, they indirectly explain the failure of clinicians 

 promptly to discover the tuberculous process, since in incipient cases 

 the destruction is so insignificant, that no increase of sulfur can 

 be detected.^^ 



SuMMARY. Comparisons of the diagnostic values of the uri- 

 nary findings for neutral sulfur with those for the serum reaction 

 in tuberculosis reveal the f ollowing f acts : 



1. The diazo or Weiss test in tuberculosis is less constant, in gen- 

 eral, than the serum reaction. 



2. Positive results with the diazo or the Weiss test are of value 

 only if typhoid is excluded. There are also a few other patho- 

 logical conditions in which these tests are positive, but the data at 

 hand are inadequate for conclusions regarding the constancy of 

 these findings. 



3. The urinary findings are not sufficiently frequent in tuber- 

 culosis to be of special diagnostic value, even when other possible 

 complications giving rise to positive tests can be excluded. 



4. The occurrence of increased amounts of urinary neutral 

 sulfur, in advanced stages of disease, is quite constant and may be 

 of prognostic value, especially in connection with corresponding 

 negative findings in the serum, 



11 These examinations were made during the spring and summer of 1914. 

 At that time we had the opportunity of niaking the tuberculin test on only 6 

 cases of the ii reported above. Since then, however, in two more cases the 

 tuberculin test was made and in all 8 cases it was positive. Moreover, very 

 recently we received a report that one of the patients of this series had a hemor- 

 rhage and also has a very distinct consolidation at present— about 8 months 

 after the first serum test. We take this opportunity to thank Dr. Marks, who 

 was kind enough to give us this information. 



