28 



least one homologue has been found in a case of lobar pneumonia. I think, 

 therefore, it will be of interest and will obviate repetition, if the result 

 of the serological classification of the 45 Group IV pneumococci from 

 lobar pneumonia and the 40 strains from other diseases are considered 

 : :!l > of the latter were Group EV, 5- Type III, 2 Type I and 1 



T\| en. 



The following tables show the results of agglutination tests 

 with 12 type sera, upon 77 strains of Group IV pneumococci. 

 The strains used for immunisation are included in the " Totals " 

 except in the two instances^where these cultures were obtained 

 from the Rockefeller Institute. 



Serological Types distinguished in Group IV. 



t * Two types in the same sputum 



