AmFJe°bUri887arm*}       Gleanings  from  Foreign  Journals.  71 
to  the  larynx.  The  operation  is  repeated  2  or  3  times  a  day  and 
nothing  but  a  little  black  coffee  is  administered  to  the  patient. — lbid.y 
xii,  page  955. 
Nubian  blacking,  which  is  considerably  used  in  England,  consists 
of  32  parts  of  blacking  (made  by  dissolving  15  parts  of  aniline  blue, 
and  15  parts  of  Bismarck  brown  in  '800  parts  of  alcohol),  126  parts  of 
alcohol,  11  parts  camphor,  16  Venice  turpentine  and  36  parts  of  shel- 
lac.— Ibid.,  xii,  page  817. 
Violet-phosphorescent  sulphide  of  calcium.— In  commerce  there  is 
found  a  durable  violet-phosphorescent  sulphide  of  calcium  the  prepa- 
ration of  which  has  been  kept  secret.  According  to  analysis  it  consists 
of  37  per  cent,  sulphide  of  calcium,  50  per  cent,  lime,  7  per  cent,  sul- 
phate of  calcium,  5  per  cent,  of  carbonate  of  calcium  and  traces  of 
silicic  acid,  magnesia,  phosphoric  acid  and  alkalies.  If  prepared  oys- 
ter shell  is  heated  with  sulphur  in  the  same  proportions  as  they  exist 
in  the  "  phosphorus  of  Canton  "  a  product  but  slightly  phosphorescent 
is  obtained.  The  following  formula  is  recommended  as  yielding  the 
best  product : — 20  grams  of  lime  prepared  from  the  shells  of  hypopus 
vulgaris  are  finely  powdered  and  intimately  mixed  with  6  grams  of 
roll  sulphur  and  2  grams  of  starch.  About  8  cc.  of  a  solution  pre- 
pared by  mixing  100  cc.  absolute  alcohol,  0*5  grams  subnitrate  of  bis- 
muth and  several  drops  of  hydrochloric  acid,  are  dropped  on  the  mix- 
ture and  the  alcohol  having  been  allowed  to  evaporate  spontaneously, 
it  is  then  heated  in  a  crucible  to  bright  cherry  redness  for  twenty  min- 
utes. The  crucible  is  allowed  to  cool  off,  the  thin  layer  of  calcium 
sulphate  removed,  and  the  contents  of  the  crucible  powdered  and 
again  heated  for  about  half  an  hour.  If  the  heat  was  not  too  intense 
the  mass  will  be  granular,  breaking  readily  on  slight  pressure.  When 
powdered  again  it  loses  considerable  phosphoresence. — Chemisch  Tech- 
nischer  Centr.  Anzeiger,  iv,  page  845. 
Bleaching  Liquid. — The  addition  of  a  small  quantity  of  glycerin  to 
a  bleaching  mixture  of  chlorinated  lime  and  soda  makes  the  fabric 
whiter,  does  not  affect  the  fibers,  and  does  not  require  the  use  of  acid  to 
remove  the  chlorinated  lime. — Chem.  Tech.  Centr.  Anzeiger,  iv,  page  839. 
Or <Sin — a  new  dermatological  remedy — is  a  white,  stable  powder 
having  a  mild  aromatic  odor  and  a  sweet,  bitter  taste,  dissolves  readily 
in  the  ordinary  solvents  and  crystallizes  easily  from  aqueous  solutions. 
Orcin  is  a  dihydroxyltoluol  and  is  closely  related  to  resorcin.  It  is 
prepared  synthetically  by  fusing  hydroxylate  of  potassium  with  chlo- 
