Dec.!'i??o "  ■ }  Gleanings  from  the  Foreign  Journals.  603 
acid  is  readily  calculated. — Phar.  Zeitung^  1880,  p.  477,  from  Jour, 
Phar.  et  Chim, 
The  G elatin'i%ation  of  Dialyzed  Iron  is  due  to  the  supersaturation  of 
the  liquid  with  ferric  hydrate,  either  in  consequence  of  too  long  con- 
tinued dialysis  or  on  account  of  the  absorption  of  ammonia  from  the 
air.  Such  a  gelatinized  preparation  may  be  restored  again  by  the  care- 
ful addition  of  solution  of  ferric  chloride.  From  his  own  observations, 
Hager  regards  dialyzed  iron  as  an  effectual  remedy.^ — Phar  Centralhalky 
1880,  p.  387. 
Two  New  Anaesthetics.  —  Dr.  E.  Taube  reports  the  results  of  experi- 
ments made  with  monochlorethylidene  chloride  (spec.  grav.  1*372)  and 
monochlorethylene  chloride  (spec.  grav.  1*422),  which  have  an  odor  resem- 
bling that  of  chloroform,  and  produce  anaesthesia  without  decreasing 
respiration  and  circulation.  The  following  products  are  obtained  by 
the  action  of  chlorine  upon  ethyl  chloride  : 
Ethyl  chloride,                                 CH3— CH^Cl    boiling  point  i2°C. 
Ethylene  chloride,                         CH,C1— CH^Cl        «  35 
Ethylidene  chloride,                   CH3— CHCl.,        *'         "  60 
Monochlorethylene  chloride,           CH^Cl— CHCl^        "  "115 
Monochlorethylidene  chloride,    CH3 — CCI3  "         "  75 
Dichlorethylene  chloride,               CHCI.,— CHCl.,        "         "  137 
Dichlorethylidene  chloride,      CB.Cl— CCI3  "         "  102 
Pentachlorethane,                          CHCI^— CCI3  "         "  146 
Perchlorethane,                                CCI3— CCI3  "  "182 
—Ibid.,  p.  390.  
GLEANINGS  FROM  THE  FOREIGN  JOURNALS. 
By  Frederick  B.  Power. 
On  the  Amount  of  Nitrite  of  Ethyl  in  Spirit  of  Nitrous  Ether* 
By  E.  Kellstrom. — The  author  calls  attention  to  the  very  great  varia- 
bility in  the  amount  of  nitrite  of  ethyl,  as  contained  in  different  speci- 
mens of  the  spirit  of  nitrous  ether,  and  gives  the  mode  of  procedure 
employed  in  the  examination.  A  certain  amount  of  the  preparation  is 
weighed  in  a  strong  bottle  and  digested  with  an  alcoholic  potassa  solu- 
tion in  the  water  bath  until  the  ethyl  nitrite  becomes  fully  decomposed ; 
the  solution,  which  now  contains  potassium  nitrite,  is  evaporated  on  the 
water  bath,  the  residue  again  dissolved  in  water,  filtered,  diluted  with 
distilled  water,  acidulated  with  sulphuric  acid,  and  titrated  with  a  solu- 
tion of  permanganate  of  potassium. 
