AmApriir'  ?9%rm'  )  Use  of  Boric  Acid  as  a  Disinfectant. 
209 
TABLE  II. 
Results — Organism. 
Number  of  Cubic  Centimeters  of  Saturated  Solution  of  Boric  Acid 
Added  to  5  Cc.  of  Frankel's  Solution. 
Bt  arbor eicens  , 
B.  capsulatus .  .  , 
B.  cereus  
B.  claocae  , 
B.  colon  , 
B.  dysenteries  , 
H.  enter itidis  , 
B.  fluorescens  liquefaciens 
B.  gasoformans  
B.  granulosum  ......... 
B.  of  hog  cholera  
B.  mesentericus  .  .  . '  
B.  proteus  vulgaris  
P.  pyocyaneus  
Strep,  pyogenes  
B.  paratyphosus  "A"  .  .  . 
B.  paratyphosus  "B"  ... 
B.  typhosus  
+ 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+ 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+ 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+ 
+  + 
+  + 
+  + 
+ 
+  + 
+  + 
+  + 
+  + 
+  + 
+ 
+ 
+ 
+  + 
+ 
+  + 
+  + 
+  + 
+ 
+ 
+  + 
+ 
+  +  +  + 
+  + 
+ 
+  + 
+  + 
+ 
+ 
+  I  + 
+  +    +  + 
+  !  + 
+  +!  + 
+  +  + 
+  +    +  + 
+  + 
+ 
+  + 
+    1  + 
+  + 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
+  + 
+ 
+ 
+  :  + 
+  I  + 
+  :  + 
+  ~ 
+  + 
+  + 
+  !  + 
+  !  + 
+  ;  + 
+ !  - 
+  + 
secured  until  after  0.6  Cc.  of  the  acid  were  added  to  5  Cc.  of 
Frankel's  solution. 
In  order  to  use  a  larger  amount  of  the  boric  acid,  the  silk  thread 
method,  which  has  been  so  serviceable  in  the  past  in  similar  studies, 
was  used. 
Sterile  white  silk  threads  one  inch  long  were  placed  in  broth 
suspension  of  the  organism  for  iJ/2  hours.    They  were  then  re- 
TABLE  III. 
Results— Organism. 
Time  in  Minutes  that  a  Silk  Thread  Impregnated  with  the  Organism  was 
Exposed  to  Saturated  Boric  Acid. 
5- 
x5- 
20.    |  25. 

30. 
35- 
40. 
45- 
50. 
+  + 
+  + 
+  + 
+  +  |  +  + 
+  + 
+  + 
+  +  i  +  + 
+  + 
+  + 
+  + 
+  + 
++ ;  ++ 
+  + 
+  + 
+  +  1  +  + 
+ 
+  + 
+  + 
+  + 
++ :  ++ 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  +!+  + 
+  + 
B.  paratyphosus  "B"  .  . 
+  + 
+  + 
+  + 
+  +  1  +  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
+  +!+  + 
+  + 
+  + 
+  + 
+  + 
+  + 
B.  capsulatus  
+ 
+  1 
B.  cyanogens  
+  + 
+  + 
+  + 
+  +  !  +  + 
+  + 
+  + 
+  + 
+  + 
+ 
B.  proteus  vulgaris.  .  .  . 
+  + 
+  + 
+  + 
+  +  1  +  + 
+  + 
+  + 
+  + 
+  + 
+  + 
++  normal.    +  some 
Tth.    —  no  growth. 
moved  with  a  sterile  platinum  needle,  placed  into  sterile  Petri 
dishes  and  placed  in  370  C.  temperature  room  over  night  (ten 
