6  DICTIONARY    OF    ALTITUDES    IN    UNITED    STATES. 
BAILEY,  MAJ.  G.  E. 
An  extensive  list  of  altitudes  in  California,  compiled  by  Maj.  G.  E. 
Bailey,  was  courteously  furnished  to  this  office.  Most  of  the  alti- 
tudes compiled  by  him  have  been  obtained  from  original  sources,  but 
a  considerable  number  remains  credited  to  him  as  authority,  because 
the  original  authority  has  not  been  obtainable. 
BOUNDARY    COMMISSION. 
The  second  survey  of  the  boundary  between  the  United  States  and 
Mexico.     The  altitudes  were  determined  by  level  and  stadia. 
CHAMBERLAIN. 
Under  this  heading  are  included  altitudes  determined  by  a  survey 
of  the  town  lines  of  Massachusetts.  These  altitudes  are  trigo- 
nometric. 
CITY    ENGINEER   AND    CITY    SURVEYOR. 
In  cities  where  the  different  railroads  occupy  separate  stations  an 
extensive  correspondence  has  been  had  with  the  city  engineers  and 
surveyors  for  the  purpose  of  obtaining  the  relative  heights  of  the 
tracks  at  the  various  stations.  In  this  way  relative  heights  were 
obtained  in  550  cities  and  towns,  including  the  principal  railway 
centers  of  the  country.  Incidentally,  the  elevations  of  city  datum 
points  and  other  altitudes  within  the  cities  were  obtained. 
EASTMAN. 
These  results  are  from  barometric  work  and  from  observations 
upon  the  boiling  point  of  water. 
EMORY,  w.  H. 
These  consist  of  barometric  determinations  abstracted  from  a 
Report  of  Explorations  from  Fort  Leavenworth  to  San  Diego,  1846. 
(Thirtieth  Congress,  first  session,  Senate  document.) 
FREMONT. 
These  are  barometric  determinations  compiled  from  reports  of 
the  various  expeditions  of  Fremont  in  the  West.  Owing  to  the 
want  of  a  barometric  base  they  are,  in  general,  of  poor  quality. 
GEOLOGICAL  SURVEY  OF  NEW  YORK  (G.  S.  OF  N.  Y.). 
These  elevations  are  of  barometric  determination. 
GEOLOGICAL    SURVEY    OF    VERMONT   (G.   S.  OF  VT.). 
All  elevations  credited  to  this  authority  are  from  barometric 
determinations. 
