Office of the Chief Signal Officer, 



UNITED STATES ASMY. w> 



Clmrted from A.-.K-1 «l»ervati«r, B late,. SimnHaneoosly. Series eo mm e^h,g Oct..oo 



IXTERNATIONAI, MONTHLY CHART. 



Shew ing mrau pressure mean temperature, mean force and prevailing direction ol winds « 



7:SB A. M., Washington mean time, for the month of ^tay, 1878, o.sed 



on tlie daily charts of the Interoationul Bulletin. 



