AApJrin;m2RM-}  To  Detect  Sulphuric  Acid  in  Vinegar.  159 
1.    Roots,  Rhizomes,  &c. 
Lappa, 
Loss. 
Yield,  absorption. 
16-25 
83-75 
10-40 
Calumba, 
16- 
84- 
11-50 
Taraxacum, 
15-25 
84-75 
9-75 
Asclep.  tuberosa, 
15-25 
84-75 
10-75 
Cypripedium, 
14- 
86- 
5- 
Gentiana, 
13- 
87- 
9- 
Panax, 
12-75 
87-25 
4-75 
Krameria, 
Polygonatum, 
12-67 
87-33 
9-17 
12-60 
87-40 
6-80 
Scilla, 
12-50 
87-50 
8  50 
Althaea, 
12-50 
87-50 
8-50 
Gossypium, 
12-40 
87-60 
6-40 
Helleborus  niger, 
12- 
88- 
8-25 
Colchicum, 
11-50 
88-50 
8- 
Inula, 
11-40 
88-60 
6-40 
Rheum, 
Spigelia, 
Podophyllum, 
1 1-33 
88-67 
8-33 
11-25 
88-75 
7-25 
10-33 
89-67 
6-73 
Serpentaria, 
10-33 
89-67 
5-83 
Senega, 
10-30 
89-70 
5-67 
Asarum  canad., 
10-25 
89-75 
3-85 
Valeriana, 
Saraaparilla, 
10-20 
89-80 
6- 
9- 
91- 
4-50 
2.  Stb 
MS  AND 
Wood. 
Dulcamara, 
12- 
88- 
6-33 
Quassia, 
10- 
90- 
8- 
3. 
Barks. 
Rhus  glabrum, 
14-67 
85-33 
8-67 
Xanthoxylum, 
14-50 
85-50 
8-50 
Cinnamomum, 
10-50 
89-50 
6  50 
Prunus  Virg., 
10- 
90- 
5-25 
Cinch,  calis., 
9- 
91- 
2-80 
Pottsville,  Pa.,  March,  1872. 
4 
Herbs. 
Gain  bv  re- 
Loss.   Yield,  absorption. 
Absinthium, 
14- 
86- 
8-50 
12-25 
87-75 
8-25 
XjyJ  U tJIlOfj 
11-60 
88-40 
5-60 
XJ  OUUU  1  no. 
10-80 
89-20 
5-20 
Cr !  pp  H  nm  t\ 
XJ  1  C  L/ 11  U  U-l  <£  j 
10-33 
89-67 
6-33 
5. 
Leaves. 
Uvularia  perfol., 
18- 
82- 
8- 
Conium, 
16- 
84- 
6- 
Cataria, 
14-50 
85-50 
11-50 
Aconitum, 
14- 
86- 
9-25 
Belladonna, 
13-75 
86-25 
5-75 
Hyoscyamus, 
12-25 
87-75 
5-85 
Senna  Alexand., 
12-20 
87-80 
7-20 
Melissa, 
11-75 
88-25 
i  ou 
Matico, 
11- 
89- 
6- 
Tussilago, 
10-50 
89-50 
4-67 
Salvia, 
10-50 
89-50 
8- 
Stramonium, 
10-33 
89-67 
7-83 
PfiQmttrinnQ 
10-25 
89-75 
6-65 
Uva  ursi, 
10- 
90- 
4- 
Buchu, 
9-20 
90-80 
6. 
Flowers. 
Lavandula, 
14-25 
85-75 
7-75 
Arnica, 
13-80 
86-20 
8-80 
Anthemis, 
9-80 
90-20 
6-80 
7. 
Seeds. 
Stramonium, 
10- 
90- 
7- 
8.    Powdered  Drugs. 
Rheum, 
8-25 
91-75 
5-25 
Inula, 
8-33 
91-67 
5-30 
Calumba, 
8-50 
91-50 
7- 
Colchici  Rad., 
9- 
91- 
6- 
Sanguinaria, 
9- 
91- 
7- 
Cimicifuga, 
9-80 
90-20 
4-80 
TO  DETECT  SULPHURIC  ACID  IN  VINEGAR. 
By  James  T.  King. 
The  salts  of  barium  are  far  too  delicate  a  test  for  free  sulphuric 
acid  in  vinegar.  When  it  is  made  by  the  oxidation  of  alcohol,  the 
water  used  for  diluting  the  spirits,  in  many  localities,  contains  suffi- 
cient sulphate  of  lime  or  other  sulphates  to  give  a  decided  reaction 
with  chloride  barium,  and  if  the  vinegar  be  made  from  cider,  it  will 
generally  give  evidence  of  the  presence  of  a  sulphate  with  this  test, 
even  when  the  sample  is  pure  and  free  from  the  usual  adulteration. 
The  following  process  will  detect  the  five-hundredth  part  of  free 
sulphuric  acid,  and  is  sufficiently  accurate  for  all  practical  purposes. 
