Am  May%F86arm'}  Gleaning s  in  Materia  Medica.  251 
above  alkaloids,  a  beautiful  green  color,  which,  on  the  absorption  of 
moisture,  changes  to  reddish  brown.  A  similar  but  less  distinct  re- 
action is  obtained  with  a  solution  of  sodium  selenate  in  sulphuric 
acid.  A  number  of  other  alkaloids  and  glucosides  were  tested  in  the 
same  manner,  but  did  not  give  this  reaction. —  Compt.  rend.,  c,  p.  1543- 
Nicotiana  persica,  Lindley. — Mr.  E.  M.  Holmes  has  published  some 
notes  on  the  Persian  tumbeki  or  teymbehi,  which  consists  of  the  leaves 
of  the  above  species,  and  of  which  the  Shiraz  variety  is  the  most  es- 
teemed, those  of  Kechan  and  Teheran  being  about  one-half  the  value 
of  the  former.  The  species  closely  resemble  N.  Tabacum,  but  its 
leaves  are  acute  rather  than  acuminate,  and  its  corolla  is  club-shaped, 
has  a  spreading  limb,  and  is  white  inside  and  greenish  outside.  Teym- 
beki  is  smoked  in  a  special  apparatus,  a  kind  of  water-pipe,  called 
narghileh  from  its  resemblance  in  shape  to  a  cocoanut  (narghil),  the 
teymbeki  being  placed  in  a  small  reservoir  on  the  top,  and  the  vapor 
drawn  through  a  tube  which  passes  to  the  bottom  of  the  water ;  it 
collects  above  the  water  and  is  then  inhaled  through  a  long  tube. 
E.  E.  Eastes  and  W.  H.  Ince  have  made  a  chemical  examination  of 
different  varieties  of  this  tobacco,  and  obtained  the  following  results : 
Ispahan. 
Hidjaz. 
Kechan. 
Shiraz. 
Nicotine  
'5-4945 
2-046 
2-909 
.  5-835 
Saccharoid  matter  
2-64 
2-85 
5-58 
3555 
Matter  soluble  in  water  
.,  42-0 
42-3 
39-9 
55-6 
....  58-0 
577 
60-1 
44-4 
Ash  
22-0 
28-5 
28-5 
26-15 
—Pliar.  Jour,  and  Trans.,  Feb.  13,  1886,  pp.  681-683. 
Oil  of  Lemon  has  been  examined  by  G.  Bouchardat  and  J.  Lafont, 
who  found,  besides  a  little  cymene,  several  hydrocarbons  C10H16,  the 
most  abundant  of  which  is  a  citrene  boiling  near  178°  C,  having  a 
rotatory  power  exceeding  -f  105°,  and  yielding  a  solid,  optically  in- 
active dihydrochloride.  Several  terebenthenes  present  boil  near 
162°  C,  and  yield  monohydrochloride,  differing  in  power  of  rotation. 
— Compt.  rend.,  ci,  p.  383. 
An  adulteration  of  oil  of  lemon  with  oil  of  turpentine  may  be  de- 
tected, according  to  G.  Heppe,  by  slowly  heating  the  oil  in  a  dry  test 
tube  with  a  small  piece  of  copper  butyrate  to  about  170°  C,  taking 
care  that  the  temperature  does  not  exceed  180°.  The  copper  salt 
will  dissolve  in  pure  lemon  oil  with  a  green  color,  while  in  the  pres- 
ence o  oil  of  turpentine  a  yellow,  turbid  mixture  is  obtained,  red- 
dish-yellow cuprous  oxide  being  separated.    The  test  seems  also  to 
