366 
Benzin. 
Am.  Jour.  Pharm. 
July,  1895. 
The  lower  temperature  given  in  the  chart  was  that  at  which  the  first 
distillate  passed  over,  while  the  higher  temperature  was  that  regis- 
tered at  the  conclusion  of  the  distillation,  or  when,  approaching  the 
end,  the  process  was  proceeding  very  slowly. 
Any  liquid  that  refused  to  distil  from  the  bulb  upon  prolonged 
application  of  the  highest  recorded  temperature,  was  transferred  to 
a  warm  dish.  The  residues  of  petroleum  given  in  the  chart  were 
detected  by  this  means.  When  a  portion  of  each  sample  was  boiled 
for  a  few  minutes  with  one-fourth  its  volume  of  spirit  of  ammonia 
and  a  few  drops  of  silver  nitrate  test  solution,  the  ammoniacal 
liquids  were  not  turned  brown,  thereby  showing  their  freedom  from 
pyrogenous  products  and  sulphur  compounds  by  this  pharmacopoeial 
test.  To  obtain  data  for  comparison,  some  kerosene  was  examined 
in  the  same  manner  as  was  the  benzin. 
The  results  are  furnished  in  the  chart. 
SAMPLES  FROM  RETAIL  PHARMACIES. 
Odor. 
Normal  -6866 
Normal  *68o6 
Slightly  *686o 
petroleum 
4  Slightly  -68o5 
petroleum 
5  Decidedly  '6820 
petroleum 
6  Decidedly  "6802 
petroleum 
7  j  Slightly  -6905 
petroleum 
S  i  Slightly  j  -68n 
petroleum  j 
9  j  Decidedly  '6886 
petroleum  I 
10  i  Decidedly  '6889 
petroleum 
it  j  Decidedly 
petroleum 
12  I  Decidedly 
petroleum 
13  j  Strongly 
petroleum 
14  Slightly 
petroleum 
15  I  Decidedly 
!  petroleum 
16  Decidedly 
I  petroleum 
17  Decidedly 
1  petroleum 
18  Slightly 
j  petroleum 
7080 
•6795 
•7133 
■7103 
•7273 
•6811 
•7090 
•6832 
S  3 
IXTERSOLUBILITY  WITH  WATER. 
Boiling 
Point. 
25- 
73L 
25"  jOO~ 
250  690 
250  l8o° 
6-5°  |55° 
25°  8o° 
25°  67°- 
25°  65° 
133" 
iooc 
121^ 
109° 
24-5°     78°—  I02C 
24-5" 
24'5C 
24° 
24'5C 
25° 
25° 
io6°- 
6o°- 
!- 
:68°- 
I20° 
137-5° 
-  I4S0 
I05° 
ro  c.c.  of  each. 
None 
None 
None 
None 
Water  in  sample 
o-5  c.c. 
Water  in  sample 
slight 
Water  in  sample 
slight 
Water  in  sample 
slight 
Water  in  sample 
1  c.c. 
None 
None 
None 
Water  in  sample 
slight 
None 
Water  in  sample 
4  c.c. 
.Sample  in  water 
2  c.c. 
None 
so  c.c.  of  each. 
None 
None 
None 
None 
None 
Water  in  sample 
1  c.c. 
Water  in  sample 
2  c.c. 
Sample  in  water 
slight 
Sample  in  water 
slight 
Sample  in  water 
slight 
Sample  in  water 
slight 
Sample  in  water 
slight 
Water  in  sample 
ICC. 
Sample  in  water 
slight 
Sample  in  water 
slight 
Sample  in  water 
slight 
None 
Residue 
in  Dish. 
Distinctly 
petroleum 
None 
Distincth' 
petroleum 
None 
Distinctly 
petroleum 
None 
None 
Distinctly 
petroleum 
Distinctly 
petroleum 
1  c.c. 
Distinctly 
petroleum 
2-6  c.c. 
Distinctly- 
petroleum 
6  c.c. 
None 
Distinctly 
petroleum 
Distinctly 
petroleum 
Distinctly 
petroleum 
Distinctly 
petroleum 
None 
