418  Influence  of  Coffee  and  Cacao,  etc.  {%i^\^mT'' 
ON  THE  SOLUBILITY  OF  BISULPHIDE  OF  CARBON  IN 
ALCOHOL. 
By  C.  Tuchschmidt  and  0.  Follenius. 
The  solubility  of  bisulphide  of  carbon  in  alcohol  varies  considerably 
with  the  temperature.  The  authors  found  that  a  solution  saturated 
at  15°  C,  when  cooled  to  — 12°,  separates  about  one-half;  cooled  to 
— 10°,  about  one-third,  and  when  cooled  to  +10°,  about  one-fifth  of 
the  bisulphide ;  while  at  ordinary  temperatures  above  15°  C,  the 
variation  is  slight.  On  adding  bisulphide  of  carioon  from  a  burette 
to  alcohol,  a  strong  milkiness  is  produced  when  one  drop  beyond 
the  point  of  saturation  is  added.  The  authors  used  10  c.  c.  alcohol 
of  the  percentage  (by  weight)  indicated,  and  found  it  to  dissolve  the 
following  quantities  of  bisulphide  at  17°  C. : 
98-  5  per  ct.  saturated  by  18-20  c.  c, 
98.15     "  "  13-20  " 
96-95  "  10-00  " 
93-54    "  "  7-00 
Sl-37  per  ct.  saturated  by  5*00  c.  c. 
84-12     "  "  3-00  " 
76-02     "  "  2-00  " 
48  40     "  "  0-20  " 
45-90     "  "  0- 
Absolute  alcohol  dissolves  the  bisulphide  in  all  proportions. 
The  authors  ^ive  a  formula  for  calculating  the  strength  of  alcohol 
from  the  solubility  of  bisulphide  of  carbon  in  it. — Berichte  d.  d. 
Chem.  GesellscL  Berlin,  1871,  JSTo.  11,  588—585. 
ON  THE  INFLUENCE  OF  COFFEE  AND  CACAO  ON  ALIMEN- 
TATION. 
By  M.  Rabuteau. 
Two  dogs  were  taken,  as  nearly  as  possible  identical  in  size  and 
condition,  and  one  of  these  was  fed  every  day  with  20  grammes  of 
bread,  10  grammes  of  fresh  butter,  and  10  grammes  of  sugar ;  the 
other  with  20  grammes  of  cacao,  10  grammes  of  sugar,  and  an  infu- 
sion of  20  grammes  of  roasted  coffee.  This  last  ration  it  is  observed 
contained  less  solid  matter,  by  weight,  than  the  preceding.  The  first 
dog  grew  very  thin  in  a  short  time,  and  died  in  twenty-nine  days, 
showing  all  the  symptoms  of  an  insufficient  nourishment.  The  other 
continued  healthy,  though  he  grew  thin,  but  not  so  much  so  as  the  first 
dog.  The  experimenter  having  been  called  away  to  duty  at  the  forti- 
fications just  after  the  first  dog  died,  he  was  unable  to  feed  the  second 
