214 
Chemical  Notes. 
j  Am.  Jour.  Pharm. 
\      May,  1882. 
Specific 
100  Volumes  contain 
Weight  of 
94  i">pr  ot 
Alcohol 
of  Col. 
II. 
Per  cent, 
bv  wpie'ht 
of  94 
\-^y^xx  Urn 
Alcohol. 
100  Vols. 
contain 
Absolute 
A  loobol 
(Vols.) 
Per  cent. 
hv  wpicbf^ 
of 
Alcohol. 
Gravity 
at  60°F. 
Alcohol 
of  94  p.  c. 
(Vol.) 
Water. 
(Vol.) 
•8513 
90- 
11-28 
73-85 
86-75 
84-60 
78^88 
•8486 
91^ 
10-19 
74-67 
87-99 
85-54 
80-02 
•8455 
92^ 
9-05 
75-50 
89-25 
86-48 
81-19 
•8429 
93^ 
7-97 
76-32 
90-54 
87-42 
82-33 
•8400 
94- 
6-86 
77-14 
91-83 
88-36 
83-50- 
•8368 
95- 
5-72 
77-96 
93-15 
89-30 
84-71 
•8338 
yb 
4  oU 
78-78 
94-48 
90-24 
85-91 
•8306 
97* 
3-46 
79-60 
95-83  ' 
91-18 
87-14 
•8274 
98^ 
2-32 
80-42 
97-20 
92-12 
88-38 
•8240 
99^ 
1-16 
81-24 
98-59 
93-06 
89-65  . 
•8206 
100^ 
0-00 
82-06 
100-00 
94-00 
90-93 
/ 
CHEMICAL  NOTES. 
By  Prof.  Samuel  P.  Sadtler,  Ph.D. 
Inorgaxic  Chemistry. — Commercial  Manufacture  of  Oxygen. — 
It  is  said  that  MM.  Brin  have  greatly  improved  Boussingault's  pro- 
cess for  the  manufacture  of  oxygen  by  alternately  peroxidizing" .  and 
re-oxidizing  barium  oxide.  The  material  employed,  after  being  re-used 
400  times,  was  found  not  to  be  deteriorated.  MM.  Brin  calculate  on 
being  able  to  supply  oxygen  on  the  large  scale  at  12  to  15  centimes 
per  cubic  meter. — Les  Mondes  and  Eng.  Ohem.  News,  45,  p.  125. 
Production  of  Active  Oxygen  out  of  Hydrogen  Peroxide. — Moritz 
Traube  has  summarized  the  results  of  a  lengthy  investigation  upon 
the  development  of  active  oxygen  as  follows : 
1.  Palladium  charged  with  hydrogen,  when  shaken  up  with  water 
and  oxygen  (air)  yields  immediately  and  abundantly  hydrogen  perox- 
ide, a  matter  which  has  been  hitherto  overlooked. 
2.  The  oxidizing  action  of  hydrogenized  palladium  in  the  presence 
of  oxygen  and  water  arises  not  directly  from  the  palladium  itself,  but 
almost  exclusively  from  the  hydrogen  peroxide  developed. 
