542 
American  Pharmaceutical  Association. 
Am.  Jour.  Pharm. 
Oct.,  1884. 
Numbers. 
Approximate 
capacity. 
Length  of 
body. 
Internal 
diameter 
at  the  lop. 
Internal 
diam'ter  of 
body  at  the 
shoulder. 
Depth  of 
shoulder. 
Length  of 
rubber 
tube. 
6 
Q 
U.  S.  fluid 
measure. 
Millimeters. 
Inches. 
Millimeters. 
Indies. 
Millimeters. 
Inches. 
Millimeters. 
Inches. 
Millimeters. 
Inches. 
90 
3  fl.  oz. 
150 
5-09 
30 
1-181 
25 
•984 
4 
•157 
200 
7-87 
150 
5    1 ' 
180 
7-09 
36 
1  "417 
30 
1-181 
6 
■236 
240 
9-45 
240 
8  " 
210 
8*27 
42 
1*654 
35 
1-378 
8 
•315 
280 
11-02 
360 
12  " 
240 
9-45 
48 
1-890 
40 
1-575 
10 
•394 
326 
12-60 
530 
18  " 
270 
10-63 
54 
2-126 
45 
1-772 
12 
•472 
360 
14-17 
740 
25  " 
300 
1T81 
60 
2-362 
50 
1-968 
14 
•551 
400 
15  -75 
1,240 
42  " 
360 
14-17 
72 
2-835 
60 
2-362 
16 
•630 
480 
18  89 
1,960 
66  " 
420 
16  -53 
84 
3  -307 
70 
2*756 
18 
•709 
560 
22-05 
3,000 
100  " 
480 
18-89 
96 
3-780 
80 
3  -150 
20 
•787 
640 
25-20 
3,780 
8  pts. 
540 
21-25 
108 
4-252 
90 
3-543 
22 
•866 
720 
28-35 
5,700 
12  " 
600 
23-62 
120 
4-724 
100 
3-937 
24 
•945 
800 
31-50 
7,600 
16  " 
660 
25-98 
132 
5-197 
110 
4-331 
26 
1-024 
880 
34-65 
9,850 
21  " 
720 
28-35 
144 
5-670 
120 
4-724 
28 
1-102 
960 
37  -80 
12,500 
26  " 
780 
30-71 
156 
6-142 
130 
5-118 
30 
1-181 
1,040 
40-95 
The  total  depth  of  each  percolator  is  equal  to  five  times  its  large,  and  to 
six  times  its  small  diameter.  The  exit  tube  of  Nos.  1  to  4  is  30  Mm.  (1  -181 
inch)  long,  10  Mm.  ("394  inch)  internal  diameter  at  the  throat  and  12  Mm. 
(-472  inch)  diameter  at  the  mouth;  the  corresponding  dimensions  for  Nos. 
5  to  14  are  35  Mm.  (1*378  inch)  13  Mm.  (-512  inch)  and  15  Mm.  (-591  inch). 
The  mouth  is  closed  with  a  perforated  rubber  stopper  containing  a  glass 
tube  of  3  Mm.  {\  inch)  internal  diameter,  to  this  is  attached  the  rubber  tube 
having  5  Mm  (1  inch)  internal  diameter,  and  at  the  farther  end  another 
glass  tube.  The  rubber  tube  may  be  lowered  or  raised  to  regulate  the  flow 
of  the  percolate. 
Prof.  Remington  said  that  old-fashioned  percolators  could  still  be  used 
for  such  preparations  requiring  a  comparatively  large  amount  of  men- 
struum, as  for  most  tinctures.  As  to  large  glass  percolators,  they  are  apt  to 
break  in  consequence  of  the  difficulty  of  annealing;  Prof.  Lloyd  had 
similar  experience,  but  Mr.  Hallberg  said  that  he  had  a  number  of  glass 
percolators  thirty-six  inches  high  in  use  for  three  years,  and  had  not  lost 
one  since  he  adopted  the  precaution  of  surrounding  them  with  broad  and 
thick  bands  of  India  rubber  before  putting  them  into  the  supports.  Mr.  L. 
E.  Sayre  suggested  that  maceration  in  glass  percolators  be  conducted,  not 
by  closing  the  lower  orifice,  but  by  covering  the  well  ground  top  with  a 
tightly  fitting  plate,  so  that  the  air  could  pass  out  below  as  the  menstruum 
descended. 
