396  Laboratory  Notes.  {A^5S.BE 
Commercial.  U.S.P. 
Per  Cent.  Per  Cent. 
(1)                                                                25-48  97'53 
(2)                                                                24-94  99-09 
(3)  •  •                                         27-60  93-34 
(4)                                                                28-16  91-15 
(5)                                                                27-20  100-05 
(6)                                                                  25-10  100-40 
(7)                                                                  .27-97  9770 
(8)                                                                28-60  97-51 
(9)  *•                                          22-98  98-24 
Average   26*45  97*22 
Minimum   22*98  91  '15 
Maximum   28*60  100*40 
Turpenti?ie. — The  turpentine  examined  during  the  past  year  con- 
formed in  nearly  every  instance  to  the  U.S.P.  requirements.  The 
odor  and  general  appearance  are  taken  into  consideration  when 
passing  upon  samples  of  this  substance,  as  well  as  the  specific 
gravity,  boiling  point  and  other  U.S.P.  tests. 
Twelve  lots  examined,  aggregating  about  400  barrels,  gave  the 
following  results: 
Specific  Gravity. 
Boiling  Point. 
Residue. 
Solubility 
(I)  .  . 
•  '8590 
I55°-I72°  C. 
slightly  abnormal 
O.K. 
(2)     ■  • 
•  -859I 
i540-i7o°  C. 
( i 
(3)   •  • 
•  '8583 
i56°-i7o°  C. 
normal 
(4)   -  ■ 
.  *866i 
i55°-i68°  C. 
<  c 
(5)   •  • 
•8630 
i5o°-i57°  C. 
a 
<« 
(6)    .  . 
•  -8572 
i56°-i6o°  C. 
( 1 
«( 
(7)   •  • 
.  -8561 
i58°-i6o°  C. 
( ( 
(8)   .  . 
.  ^564 
i55°-i69°  C. 
<( 
«( 
(9)   •  • 
•  '8555 
i55°-i66°  C. 
(( 
(10)    .  . 
■  -8651 
i56°-i65°  C. 
<  i 
t( 
(11)   .  . 
.  '8651 
i55°-i59°  C. 
«( 
(12)   .  . 
.  -8306 
8o°-i7o°  C. 
abnormal 
Average 
•  '8523 
i49°-i66°  C. 
Sample  No.  12  contained  about  25  per  cent,  of  gasoline.  Also 
traces  of  rosin  were  found  in  the  residue  obtained  upon  the  evapo- 
ration of  a  convenient  quantity. 
Yellow  Wax. — Probably  no  article  in  the  Pharmacopoeia  is  adul- 
terated to  the  extent  that  yellow  wax  is,  A  product  can  very  easily 
be  made  up  by  using  Japan  wax,  tallow,  paraffin,  stearic  acid,  car- 
nauba  wax,  etc.,  in  the  proper  proportions,  which  will  have  the 
specific  gravity  and  melting-point  conforming  to  the  U.S.P.,  and 
