412  Gleanings  from  the  German  Journals.  {^Si^""* 
tinct.  belladon.,  2*0  ;  aq.  menth.  pip.,  50*0 ;  syr,  opiat,  10*0.  Children 
from  two  to  twelve  years  old  receive  a  teaspoonful  every  two  hours, 
the  treatment  being  continued  for  one  week.  This  medicine,  like  an- 
tipyrine,  shortens  the  attacks. — (Wr.  Med.  Klin.  Wochenschr.) — 
Oesterr.  Zeitschr.  f.  Pharm.,  1889,  285. 
A  new  optical  glass,  recently  introduced  in  Sweden,  is  used  for 
making  perfectly  achromatic  lenses  having  a  magnifying  power  at 
least  500  diameters  greater  than  those  in  present  use.  The  glass  is  made 
by  introducing  small  quantities  of  phosphates  and  borates.. — Apoth. 
Ztg.y  1889,  651. 
Constituents  of  some  Volatile  Oils. — Oil  of  Laurel-leaves  is  lsevogyre 
and  has  sp.  gr.  0*924  at  20°  C.  Only  the  fractions  boiling  below 
180°  were  examined  and  found  to  be  composed  of  a  little  pinene  with 
considerable  cineol.  The  portion  boiling  above  180°  had  a  decided 
odor  of  anethol. 
Oil  of  Laurel-berries. — About  50  per  cent,  boils  below  180°  and 
consists  of  a  little  pinene  and  much  cineol.  The  hydrocarbon  laurene 
of  Briihl  was  not  found,  the  peculiar  reactions  of  which  described  by 
him  were  due  to  admixture  of  cineol. 
Oil  of  Olibanum. — The  crude  oil  is  slightly  lsevogyre;  sp.  gr.  0'872 
at  20°.  Two  fractions  were  obtained  by  rectification,  both  lsevogyre : 
I.  Boiling-point  157—160°,  sp.  gr.  0*870  at  20°;  II.  Boiling-point 
160 — 165°,  sp.  gr.  0*860  at  20°.  Pinene  was  found  and  its  identity 
with  olibene  established.  By  treatment  with  bromine,  a  fraction, 
boiling  at  177 — 179°,  gave  a  considerable  quantity  of  dipentene  tetra- 
bromide,  proving  the  presence  of  dipentene  in  this  oil. 
Oil  of  Elemi  is  dextrogyre,  has  sp.  gr.  0*900.  The  fractions  below 
175°  contain  dextro-phellandrene,  a  hydrocarbon  also  found  in  the 
oils  of  bitter  fennel  and  Phellandrium  aquaticum.  Dipentene  is 
present  and,  in  addition,  polyterpenes  and  oxygenated  products.  In 
the  rectification  small  crystals  were  repeatedly  observed  which  were 
assumed  to  be  amyrin. 
Oil  of  Sage:  Dextrogyre,  sp.  gr.  0*917  at  20°;  the  first  fractions 
contain  pinene  and  cineol;  the  greater  portion  boils  at  201 — 204°,  is 
called  salviol  and  will  be  further  studied. 
Oil  of  Mace. — Considerable  distils  at  the  temperature  of  165°;  the 
distillate  has  sp.-  gr.  0*854  at  20°  and  is  composed  chiefly  of  pinene, 
although  slightly  lsevogyre.  The  crude  oil,  as  also  the  higher  boiling 
fractions,  are  strongly  dextro-rotary,  and  further  investigation  will  be 
