156         Minutes  of  the  Pharmaceutical  Meeting.  { Xmd™ 
•sists  of  a  cylinder  of  metal,  into  which  a  conical  metal  chamber  fits,  leaving  an 
■empty  space  between  the  two ;  into  this  space  two  pints  of  water  and  half  the  bulk 
of  carbonate  of  sodium  are  placed  ;  the  conical  tube  is  placed  in  the  solution  and 
agitated  for  several  minutes,  when  the  soda  solution  is  changed  for  water  and  chloride 
of  ammonium,  and  a  rolling  motion  is  kept  up  for  10  or  12  minutes,  when  the  inner 
vessel  in  which  was  placed  the  water  will  be  found  rilled  with  ice,  from  which  it  can 
be  readily  removed,  owing  to  the  conical  form. 
A  communication  from  Samuel  F.  Troth  was  read,  giving  the  amount  sold  and 
and  price  paid  for  sulphate  of  quinia  by  the  firm  of  Henry  Troth  &  Co.  during  a 
period  of  31  years,  commencing  with  1823,  when  quinia  was  first  manufactured  in 
Philadelphia.  The  following  table  will  show  the  fluctuation  in  the  price  of  quinine 
-during  the  period  named. 
Average  for 
Year. 
Amount  sold. 
Price 
per  oz. 
the  year. 
1823 
52 
oz. 
$20 
00  % 
;i6 
OO  $ 
15 
OO 
$17  OO 
1824 
63 
oz. 
14 
00 
12 
OO 
13  OO 
1825 
50 
oz. 
8 
00 
8 
OO 
8  00 
1826 
145 
oz. 
5 
25 
5 
50 
6 
OO 
7  00 
5  95 
1827 
200 
oz. 
7 
5° 
6 
OO 
6  75 
1828 
560 
oz. 
6 
00 
3 
25 
4  62^ 
1829 
700 
/ 
oz. 
2 
90 
2 
7  1 
2 
62 
2  43 
2  25 
2  59 
1830 
2IO 
oz. 
2 
5° 
1 
75 
2  12^ 
I831 
500 
oz. 
1 
35 
1 
40 
1 
50 
1  42 
1832 
300 
oz. 
1 
75 
1 
90 
2 
OO 
1  89 
J833 
250 
oz. 
70 
1 
87 
1  79 
1834 
700 
oz. 
1 
25 
1 
40 
j 
55 
1  80 
1  50 
1835 
300 
oz. 
60 
1 
62 
65 
1  62 
1836 
650 
oz. 
1 
45 
1 
5° 
58 
1  5i 
1837 
3^5 
oz. 
1 
40 
40 
1  40 
1838 
325 
oz. 
65 
60 
90 
1  69 
1839 
279 
oz. 
2 
75 
3 
30 
2 
85 
2  90 
2  94 
1840 
100 
oz. 
3 
«i 
2 
8?| 
3 
00 
3  00 
J841 
362 
oz. 
2 
62^ 
2 
55 
2 
5° 
2  54 
1842 
125 
oz. 
2 
00 
1 
75 
l 
60 
1  78 
1843 
275 
oz. 
55 
1 
60 
1 
70 
1  75 
1  80 
1  68 
1844 
260 
oz. 
2 
00 
3 
00 
2  50 
1845 
300 
oz. 
2 
35 
2 
40 
2  372- 
1846 
350 
oz. 
2 
40 
2 
20 
2  30 
1847 
420 
oz. 
2 
30 
2 
35 
2 
40 
2  35 
1848 
300 
oz. 
2 
60 
2 
65 
2 
70 
2  65 
1849 
800 
oz. 
3 
00 
2 
95 
3 
25 
3  65 
3  14 
1850 
200 
oz. 
3 
70 
3 
70 
3  70 
1851 
200 
oz. 
3 
25 
3 
25 
3  25 
1852 
150 
oz. 
3 
00 
2 
80 
2  90 
*853 
400 
oz. 
2 
70 
3 
00 
3 
20 
2  97 
During  the  first  20  years  the  average  price  was  $4.15,  and  during  the  last  11 
years  $2.70  per  oz.  The  highest  price  paid  for  the  article  was  $20  00,  in  1823,  and 
the  lowest  $1.25,  in  1834. 
A  specimen  of  bicarbonate  of  ammonia  was  presented  to  the  meeting  as  now  often 
found  mixed  with  the  common  carbonate  in  the  casks  in  which  it  is  imported.  For 
