AmkJprUiuP8S4arm•}  Preparations  of  Phosphates  of  Iron,  etc.  181 
similar  conditions,  the  phosphoric  anhydride  was  calculated  from 
the  amount  used. 
Several  samples  of  the  scale  phosphate  of  iron,  treated  according 
to  the  above,  gave  an  average  of  13-2  per  cent,  iron  and  17  per  cent, 
phosphoric  anhydride. 
The  following  table  shows  the  specific  gravity  and  average  result 
of  several  analyses  of  each  preparation  of  elixir  phosphate  of  iron, 
quinine  and  strychnine ;  syrup  phosphate  iron,  quinine  and  strych- 
nine, and  several  chemical  foods. 
All  the  elixirs  claimed  to  contain  2  grains  phosphate  of  iron,  I 
grain  salt  of  quinine  and        to  -fa  grain  strychnine. 
Number. 
Specific 
Gravity. 
Per  Cent. 
Fe. 
Per  Cent. 
p2o5. 
Total 
Alkaloids. 
1 
1-17 
•39 
•52 
1  "33 
2 
1*09 
'32 
•20 
■  '79 
3 
1  06 
•26 
'22 
•30 
4 
1*12 
•40 
•15 
i'8o 
5 
i'o6 
•37 
•45 
•20 
6 
ro8 
•37 
"43 
•60 
7 
1 '09 
'17 
•29 
•70 
8 
ri4 
•45 
trace 
i'35 
9 
ro8 
•36 
trace 
1-16 
10 
1-30 
•034 
3-00 
•44 
11 
i-34 
'31 
•27 
12 
1-18 
•34 
•25 
No.  1,  made  by  the  writer,  contained  2  grains  scale  phosphate  of 
iron,  1  grain  quinine  sulphate  and  -fa  gr.  strychnine  to  a  fluid  drachm. 
This  preparation  formed  a  precipitate  when  mixed  with  water, 
and,  on  being  exposed  to  light,  gradually  became  darkened  in  color. 
No.  2,  a  commercial  preparation  labelled  to  contain  same  as  above, 
was  of  a  light  greenish  color,  and  clouded  slightly  on  addition  of 
water. 
Nos.  3,  4,  5  were  of  light  greenish  color  and  mixed  with  water 
without  precipitation.  No.  4  was  stated  to  contain  half  the  amount 
of  iron  as  citro-chloride,  and  the  alkaloid  quinine. 
Nos.  6  and  7  were  dark  colored,  and  did  not  precipitate  when 
mixed  with  water. 
Nos.  8  and  9,  made  by  prominent  manufacturers,  are  considered 
standard  preparations.  They  did  not  precipitate  on  standing,  and 
were  miscible  with  water;  9  was  a  beautiful  elixir  of  bright  green 
