Am.  Jour.  Pharm.  \ 
April,  1886.  / 
Eucalyptus  Products. 
183 
ter  since  it  is  obtained  from  the  mallee  scrub,  a  dense  shrubby  growth 
covering  desert  land  and  consisting  of  a  mixture  of  E.  oleosa,  E.  in- 
erassata,  E.  gracilis  and  E.  uncinata  in  different  proportions.  Mr. 
Bosisto  calculates  that  in  Victoria  alone  the  mallee  scrub  is  capable  of 
furnishing  4,843,872  gallons  of  oil,  and  the  E.  amy gdalina  280,861  ,- 
000  gallons. 
Other  species  yielding  abundance  of  oil,  such  as  the  E.  salubris  of 
W.  Australia,  will  probably  furnish  volatile  oil  to  commerce,  when 
manufactories  are  established  in  the  districts  where  they  are  abundant. 
The  trees  mentioned  by  Sir  F.  von  Mueller  as  oil-yielding  species  are 
E.  salmonophloia  and  E.  Raveretiana,  W.  Australia;  E.  acmenoides, 
E.  microcorys  and  S.  eugenioides  in  the  Southern  provinces.  The 
volatile  oil  of  E.  citriodora  will  probably  become  an  article  of  export 
as  soon  as  it  can  be  manufactured  on  a  commercial  scale,  so  as  to 
compete  in  perfumery  with  oils  of  similar  odor.  This  tree  is  regarded 
as  a  variety  of  E.  maculata,  bearing  the  same  relation  to  it  that 
Thymus  citriodora  does  to  Thymus  serpyllum.  The  remark  is  made 
concerning  it,  in  ( Eucalyptographia/  that  the  perfume  seems  only 
developed  within  the  subtropical  regions  of  the  range  of  this  species, 
but  that  it  is  nevertheless  hereditary,  i.e.,  when  cultivated  outside 
those  regions. 
Under  the  head  of  E.  crebra,  another  species  of  eucalyptus,  discov- 
ered by  Mr.  Sellheim,  is  alluded  to  as  having  lemon-scented  foliage. 
This  has  since  been  described  by  Mr.  T.  M.  Bailey,  in  the  excellent 
synoposis  of  the  'Queensland  Flora/  as  a  new  species,  under  the  name 
of  u  E.  Staigeriana,  F.  von  Mueller,  ined."  This  plant,  according  to 
Mr.  Staiger,  yields  a  large  quantity  of  volatile  oil,  2f  per  cent.,  which 
so  exactly  resembles  oil  of  verbena  in  odor,  that  it  might  easily  pass 
for  it.  Its  specific  gravity  is  0*901.  The  odor  of  the  oils  of  E.  pipe- 
rita and  E.  hoemastoma  bears  some  resemblance  to  peppermint. — Phar. 
Jour,  and  Trans.,  January  9th,  1886,  p.  581.  (See  also  Am.  Jour. 
Pharm.,  1876,  pp.  371-375.) 
Menthol  in  Urticaria  and  Pruritus.— Among  the  myriad  of  rem- 
edies for  these  troublesome  affections  we  have  no  other  which  affords  such 
complete  and  instantaneous  relief  as  a  solution  of  menthol.  We  have  used  this 
remedy  for  urticaria  in  three  cases.  Not  only  is  the  itching  relieved  for  the 
time,  but  a  cure  seems  to  be  affected.  In  pruritus  ani,  and  in  eczema,  moisten- 
ing the  parts  with  menthol  solution  causes  an  immediate  cessation  of  the  pain. 
The  solution  should  contain  from  2  to  10  grains  of  menthol  to  the  ounce  of 
water.— Buffalo  Med.  and  Surg.  Jour.,  March,  1886,  p.  382. 
