142 
EXTRACT  OF  COD  LIVER. 
the  new  preparation  has  been  distinctly  proved  by  him  to  be  so 
superior  in  remedial  effects  to  cod  liver  oil,  that  for  some  con- 
siderable time  back  it  has  almost  entirely  superseded  the  oil  in 
his  practice  in  that  hospital.  This  statement  is  open  to  verifica- 
tion by  any  one  who  chooses  to  make  inquiries  in  the  proper 
quarter. 
If  Messrs.  Hills  and  Squire,  who  must  have  many  friends 
among  the  hospital  physicians  and  surgeons  of  London,  will  con- 
sent to  procure  further  serious  trials  of  Guffroy's  extract  in  one 
or  more  of  the  large  metropolitan  institutions,.  I  shall  be  much 
pleased ;  and  I  beg  here  to  inform  those  gentlemen  that  I  shall 
be  ready  to  supply  gratuitously  sufficient  prepared  cod  liver  ex- 
tract for  the  treatment  of  a  large  number  of  patients,  provided 
the  medical  attendants  will  undertake  to  permit  a  medical  gentle- 
men on  my  behalf  to  take  part  in  the  experiments,  duly  to  record 
the  cases,  and  to  publish  them  in  the  medical  journals. 
I  am,  &c,  John  Barr. 
83  Fleet  Street,  December  27,  1865. 
Table  Exhibiting  the  Comparative  Composition  of  Cod-liver  Oil 
and  Cod-liver  Extract. 
Cod-liver  oil. 
Cod-liver  extr. 
Oily  acids  and  glycerin 
.  95-967 
none 
Fish-bile  constituents  . 
0-318 
60-620 
Propylamina 
.  occasional  trace 
2-545 
Acetic,  lactic,  and  butyric  acids 
0-120 
6-000 
Phosphorus  and  phosphoric  acid 
0-113 
2-090 
Sulphur  and  sulphuric  acid 
0-071 
•200 
Iodine  .... 
0-037 
•154 
Chlorine,  with  trace  of  bromine 
0-149 
1-525 
Soda  ..... 
0-055 
1-170 
Magnesia    .  . 
0-009 
•366 
Lime  .       .  ... 
0-152 
•510 
Potash  .... 
none 
•211 
Ammonia  .... 
none 
2-862 
Water  and  loss 
3-009 
21-847  • 
100-000 
100-000 
