446       Recent  Literature  Relating  to  Pharmacy.  {^^l^S^i' 
until  from  9  to  10  parts  of  water  have  been  added,  when  it  again 
becomes  clear.  Indicated  as  a  substitute  for  cresol  soap  solutions, 
or  lysol.    (Viertel-Jahrschr.  f.  Pract.  Phar.,  1905,  page  no) 
Mukogen. — This  is  said  to  be  the  hydrochloride  of  dimethyl- 
phenyl-p-ammonium-/3  oxynaphthoxazin  and  is  produced  by  the 
condensation  of  a  dinaphthol  with  nitrosodimethylamin. 
Mukogen  occurs  in  blue  crystals  that  are  nearly  insoluble  in 
water  but  soluble  in  alcohol  and  in  solutions  of  the  alkalies.  It  is 
said  to  act  as  an  aperient  and  is  given  in  doses  of  from  0.10  to  O.30. 
[Phar.  Post.,  1905,  page  332.) 
Tacca  pinnatifida,  the  tubers  of  this  plant,  belonging  to  the 
family  Taccaceae  and  indigenous  to  the  South  Sea  Islands  and  to 
New  Guinea,  are  said  to  contain  the  greatest  percentage  of  starch 
of  any  known  plant ;  averaging,  according  to  Wohltmann,  as  high  as 
28  per  cent.  The  starch  itself  occurs  in  commerce  as  Tahiti  arrow- 
root, Williams'  arrowroot  or  as  Fecula  de  Pia.  (Pilar.  Centralis, 
1905,  page  496.) 
Petrolatum  Ceratum. — P.  Van  der  Wielen  proposes  the  following 
formulas  for  petrolatum  or  vaseline  compounds  that  are  said  to  be 
capable  of  taking  up,  and  permanently  holding,  as  much  as  75  per 
cent,  of  water  or  of  aqueous  solutions,  and  should,  therefore,  be 
satisfactory  substitutes  for  adeps  lanae. 
Petrolatum  Ceratum  album. — White  wax  5,  white  petrolatum  95. 
Petrolatum  Ceratum  flavum. — Yellow  wax  5,  petrolatum  95.  In 
either  case  the  wax  and  the  petrolatum  are  to  be  melted  and  subse- 
quently stirred  until  cold.  (Phar.  Weekbld.  through  Apothek.  Zeitg.\ 
1905,  page  516.) 
RECENT  LITERATURE  RELATING  TO  PHARMACY. 
SOME  NEW  ESSENTIAL  OILS. 
Messrs.  Schimmel  &  Co.,  in  their  semi-annual  report  for  April- 
May,  1905,  pp.  82-86,  give  the  result  of  their  examinations  of  the 
following  oil  : 
Oil  of  Tetranthera  polyantha  var.  citrata  Nees.  Of  this  tree,  be- 
longing to  the  Lauraceae,  which  is  distributed  in  tropical  Asia,  and  is 
known  in  Java  by  the  name  "  Ki-lemolo,"  bark  and  leaves  were  sent 
to  us,  which  we  submitted  separately  to  distillation.  The  oils  here- 
by obtained  had  a  pleasant  aroma,  and  were  constituted  as  follows: 
