RESULTS OF SPIRIT LEVELING. FISCAL YEAR 1900-01. 
By II. M. v [lson, .1. il. Ren E M. Do ad R. TJ. Goode. 
INTRO] OX. 
During the field season careful ■ d in con- 
nection with the regular topographic work on th ■■•al plan 
followed in the four pre ibed in th ndix 
to the teenth Annual Rcp< lie Director, Pt. I, 
The practice of stamping an initial il name on the 
bench marks In cl, air! i i has 
better determination of th s raference to 
sea level, such changes are noted in. the list of elevations which 
folic 
In th * following lisl only those elevatio d which have 
be n ; ■;.: u bed and chec VIucli work has b 
done in - ally in mountainous 
regions, which it is thought inadvisable to publish at this time on 
account of the many lines which are left unchecked at the end of the 
field season, and also on account of errors of closure in a few circuits 
in excess of Ihe limiting error "E," allowed by the formula 
E= [stance in miles. 
These linos in most cases will be rerun to bring them within the 
required limits. 
The United States Coast and Geodetic Survey has made an elabo- 
rate general adjustment of a great net of precise leveling in the United 
States, by the method of "least squares," and the result and full 
description of this will be found in their Report for 1898-99, Appendix 
No. 8. This level net involves the results of leveling executed by the 
following organization, weighted as shown in the following extracl 
from that appendix, caul extends over the Atlantic and Central sec- 
tions of topography in a belt of closed circuits from mean sea level in 
the Gulf of Mexico, near New Orleans, northward to the Great Lakes, 
\i\u] eastward to mean sea level in the Atlantic Ocean at Boston, Sandy 
Bull. 185—01 l> 17 
