136      NOTE  ON  VARIOUS  PHENOMENA  OF  OXYGENATION. 
Sulphate  of  Veratrine. — An  excess  of  veratrine  was  treated 
with  dilute  sulphuric  acid  ;  the  perfectly  neutral  solution  was  1 
filtered  from  the  undissolved  portion,  and  left  to  evaporate  over 
sulphuric  acid.  When  dry,  the  salt  formed  a  colorless  gum-like 
mass,  which  was  readily  triturated,  and  became  electrical  when 
rubbed.    Dried  at  212°  F.,  it  gave  the  following  numbers  : — 
I.  II.  III.  IV. 
C  59-48 
59-45 
64=384 
49-90 
H  9-10 
8-44 
53  53 
8-26 
N 
2  28 
4-38 
0 
17  136 
21-22 
SO3    .  . 
6-26  6-33 
40  40 
6-24 
i  this  the 
formula  C64  W2  W  O16, 
HOSO3.- 
■Chem. 
15,  1855,  from  Leibig's  Annalen, 
NOTE  ON  VARIOUS  PHENOMENA  OF  OXYGENATION. 
By  F.  Kuhlmann. 
New  Process  of  Formation  of  Sulphuric  Acid. 
It  is  well  known  that  many  hydrocarbons  become  resinified  by 
contact  with  the  air,  in  consequence  of  an  absorption  of  oxygen. 
This  is  the  case  with  most  of  the  essential  oils,  and  the  drying 
oils  undergo  analogous  modifications  by  a  slow  acidification  ;  but 
it  has  not  been  suspected  that  these  hydrocarbons,  before  under- 
going any  considerable  modification  in  their  constitution  and  pro- 
perties, form,  as  it  were,  a  provision  of  oxygen  under  such  con- 
ditions, that  when  they  come  in  contact  with  bodies  which  have 
the  property  of  more  immediately  forming  an  intimate  combina- 
tion with  oxygen,  they  yield  the  absorbed  oxygen  to  the  latter, 
and  again  acquire  their  original  state,  becoming  again  capable 
of  attracting  oxygen  from  the  air.  In  these  cases  the  resinifia- 
ble  essential  oils  constitute  sources  of  oxygen  for  the  benefit  of 
other  bodies,  and  to  a  certain  extent  play  the  part  taken  by 
deutoxide  of  nitrogen  in  the  manufacture  of  sulphuric  acid. 
When  oil  of  turpentine  is  exposed  to  the  air  for  a  few  days, 
and  then  agitated  with  a  solution  of  sulphurous  acid  in  water,  the 
mixture  becomes  strongly  heated,  the  temperature  rises  to  122° 
F.,  and  even  higher,  and  the  sulphurous  odor  soon  disappears, 
