572 
Obituary —  Correction. 
f  Am.  Jour.  Pharm. 
t    Dec.  1,  1872. 
The  Physician's  Visiting  List  for  1873.  Twenty -second  year  of  its  publication. 
Philadelphia:    Lindsay  &  Blakiston. 
Besides  an  almanac  and  a  table  of  signs,  it  contains  Marshall  Hall's  ready 
method  in  asphyxia  ;  a  short  account  of  the  antidotes  to  various  poisons,  and  a 
table  for  calculating  the  period  of  utero-gestation.  This  is  followed  by  the 
memorandum  book,  conveniently  arranged  for  an  average  of  25  (or  a  larger 
number  of)  patients  per  week. 
Half  Hour  Recreations  in  Popular  Science.    Dana  Estes,  Editor.    No.  5.. 
Boston  :    Esten  &  Lauriat. 
The  number  before  us  contains  the  following  interesting  papers  : 
Nebulae,  comets,  meteoric  showers  and  the  revelations  of  the  spectroscope 
regarding  them,  by  Professor  H.  Schellen  ;  and  coral  and  coral  islands,  by 
Professor  J.  D.  Dana.  If  the  selections  for  the  future  numbers  are  made  as 
judiciously  as  has  been  done  for  the  one  before  us,  these  "Recreations"  will 
constitute  a  valuable  publication  for  every  intelligent  reader. 
The  Half  Hour  Recreations  are  published  in  monthly  parts,  at  $2.50  per 
annum,  or  25  cents  per  number,  and  are  handsomely  printed  upon  tinted  paper. 
A  Sketch  Map  of  the  Nile  Sources  and  Lake  Region  of  Central  Africa  ;  show- 
ing Dr.  Livingstone's  recert  discoveries  and  Mr.  Stanley's  route.  1872. 
Philadelphia:    T.  Ellwood  Zell.    Price,  25  cents. 
The  publication  of  this  map  at  the  present  time  is  very  opportune,  since  Mrt 
Stanley's  recent'African  journey  has  furnished  an  acoount  of  the  most  important 
geographical  discoveries  in  Central  Africa,  made  by  Dr.  Livingstone  during  the 
last  six  years. 
OBITUARY. 
Prof.  John  F.  Frazer,  aged  63  years,  died  suddenly  of  heart  disease  on  the 
12th  of  October,  at  the  new  building  of  the  University  of  Pennsylvania,  in 
which  institution  he  had  occupied  the  chair  of  Natural  History  and  Chemistry 
for  about  thirty  years.  He  was  a  member  of  the  American  Philosophical  So- 
ciety and  of  the  Franklin  Institute,  and  for  a  long  time  Editor  of  the  Journal 
of  the  latter.    He  was  a  man  of  extensive  learning  and  varied  attainments. 
Correction. — Mr.  Jas.  T.  King  requests  us  to  correct  an  error  in  his  paper 
published  in  the  September  number.  On  page  388,  line  23, "  five  and  three- 
tenths  grains"  should  read  twenty-five  and  three-tenths  grains. 
