Am  May?Sarm'}  Abstracts  from  the  French  Journals.  227 
with  water  which  has  previously  been  used  to  wash  the  first  con- 
tainer ;  then  filter. 
Into  a  graduated  tube,  closed  at  one  end,  containing  20  cc.  mer- 
cury and  20  cc.  of  hypobromite  solution  (prepared  by  the  follow- 
ing formula :  bromine,  10  cc;  caustic  soda  solution,  90  cc,  and 
distilled  water,  75  cc),  introduce  10  cc  of  the  above  liquid,  which 
correspond  to  2  cc  urine,  using  a  solution  of  potassium  acetate 
as  a  separating  layer. 
When  the  reaction  is  finished,  place  the  ureometer  into  a  water 
vessel,  making  the  levels  of  the  two  liquids  equal,  and  note  the 
volume  of  nitrogen,  as  well  as  the  temperature  and  the  atmospheric 
pressure,  from  which  data  the  weight  of  nitrogen  may  be  readily  cal- 
culated ;  but  troublesome  calculations  may  be  avoided  by  using  in  the 
manner  indicated  a  solution  of  4*714  gm.  of  pure  dry  ammonium 
sulphate  in  200  cc  distilled  water  ;  1  cgm.  nitrogen  is  yielded  for 
every  2  cc  of  this  solution. 
The  authors  have  applied  this  process  to  substances  in  which  the 
nitrogen  occurs  in  varied  forms.  For  substances,  like  the  pyridine 
and  quinoleine  bases,  in  which  the  nitrogen  presents  great  resist- 
ance to  oxidation  by  the  Kjeldahl  method,  they  use  the  smallest 
possible  quantity  of  water.  The  following  table  gives  some  of  their 
results  : 
Time  Consumed. 
Substance. 
Found, 
Calculated, 
Hr. 
Min. 
Dry  basic  quinine  sulphate,    .  . 
•  7'56 
7-50 
I 
15 
Methylamine  hydrochlorate,  .  . 
.  20*72 
20*70 
20 
•  4*145 
4*123 
2 
15*37 
2 
•  I5'i9 
1527 
30 
•  778 
7-65 
I 
30 
•  4-49 
4*62 
I 
2*09 
2*17 
I 
15 
I5-531 
30 
I7-I71 
45 
.  15*01 
16*09 
•  15-86 
177 
1  According  to  Dumas. 
Analgesin  yielded  after  two  hours,  1 1  -88  ;  after  three  hours,  13*03 ; 
and  after  four  hours,  15*01  ;  and  pyridine  after  two  hours  147,  and 
after  four  hours,  15-86  nitrogen.  In  both  these  substances,  the 
oxidation,  even  after  being  continued  for  a  long  time,  still  remains 
