2Q2 Table 47 (concluded) 



CORRECTIONS TO REDUCE BAROMETRIC READINGS TO STANDARD GRAVITY 



Table 47 B. — Values of s *~ go B, for use by ships at sea. 

 9° 



g = standard acceleration of gravity at sea level, 980.665 cm. sec." 1 



g* = acceleration of gravity at latitude (j> and sea level. 



B = height of mercury column, corrected for temperature and instrumental errors. 



Corrections are to be applied according to indicated sign. 



(Correction is zero at latitude 45° 32' 40" ; positive poleward and negative equatorward of this 

 latitude.) 



Height of the mercury column 



80 

 78 

 76 

 74 

 72 



70 

 68 

 66 

 64 

 62 



60 



58 

 56 

 54 

 52 



50 

 48 

 46 

 45 

 44 

 42 



40 

 38 

 36 

 34 

 32 



30 

 28 

 26 

 24 

 22 



20 

 18 

 16 

 14 

 12 



10 

 8 

 6 

 4 

 2 



Inches 



26 



27 



28 29 



30 



<P in. in. in. in. in. 



90° +.067 +.070 +.073 +.075 +.078 



88 .067 .070 .072 .075 .078 



86 .067 .069 .072 .074 .077 



84 .066 .068 .071 .074 .076 



82 .065 .067 .070 .072 .075 



+.063 +.066 +.068 +.071 +.073 

 .061 .064 .066 .069 .071 

 .059 .062 .064 .066 .068 

 .057 .059 .061 .064 .066 

 .054 .056 .058 .061 .063 



+.051 +.053 +.055 +.057 +.059 

 .048 .050 .052 .054 .055 

 .045 .046 .048 .050 .052 

 .041 .043 .044 .046 .047 

 .037 .039 .040 .041 .043 



+.033 +.034 +.036 +.037 +.038 

 .029 .030 .031 .032 .033 

 .024 .025 .026 .027 .028 

 .020 .021 .021 .022 .023 

 .015 .016 .016 .017 .018 



+.011 +.011 +.011 +.012 +.012 



.006 .006 .006 .007 .007 



+.001 +.001 +.001 +.001 +.001 



—.001 —.001 —.001 —.001 —.001 



.004 .004 .004 .004 .004 



.008 .009 .009 .009 .010 



—.013 —.014 —.014 —.015 —.015 

 .018 .019 .019 .020 .021 

 .022 .023 .024 .025 .026 

 .027 .028 .029 .030 .031 

 .031 .033 .034 .035 .036 



—.036 

 .040 

 .043 

 .047 

 .051 



—.054 

 .057 

 .059 

 .062 

 .064 



—.066 

 .067 

 .068 

 .069 

 .070 



.037 

 .041 

 .045 

 .049 

 .052 



.056 

 .059 

 .062 

 .064 

 .066 



-.068 

 .070 

 .071 

 .072 

 .072 



.038 

 .043 

 .047 

 .051 

 .054 



.058 

 .061 

 .064 

 .066 

 .069 



.071 

 .072 

 .073 

 .074 

 .075 



-.040 —.041 

 .044 .046 

 .048 .050 

 .053 .054 

 .056 .058 



-.060 —.062 

 .063 .065 

 .066 .068 

 .069 .071 

 .071 .074 



-.073 —.076 

 .075 .077 

 .076 .079 

 .077 .080 

 .078 .080 



Millimeters 



680 700 720 740 760 780 



mm. mm. mm. mm. mm. mm. 



+1.76 +1.82 +1.87 +1.92 +1.97 +2.02 



1.76 1.81 1.86 1.91 1.97 2.02 



1.75 1.80 1.85 1.90 1.95 2.00 



1.72 1.77 1.83 1.88 1.93 1.98 



1.69 1.74 1.79 1.84 1.89 1.94 



+1.65 +1.70 +1.75 +1.80 +1.85 +1.90 



1.61 1.65 1.70 1.75 1.80 1.84 



1.55 1.60 1.64 1.69 1.74 1.78 



1.49 1.53 1.58 1.62 1.66 1.71 



1.42 1.46 1.50 1.54 1.59 1.63 



+1.34 +1.38 +1.42 +1.46 +1.50 +1.54 



1.26 1.29 1.33 1.37 1.41 1.44 



1.17 1.20 1.24 1.27 1.31 1.34 



1.07 1.10 1.13 1.17 1.20 1.23 



0.97 1.00 1.03 1.06 1.08 1.11 



+0.86 +0.89 +0.91 +0.94 +0.97 +0.99 



0.75 0.78 0.80 0.82 0.84 0.86 



0.64 0.66 0.68 0.69 0.71 0.73 



0.52 0.54 0.55 0.57 0.58 0.60 



0.40 0.41 0.42 0.44 0.45 0.46 



+0.28 +0.29 +0.29 +0.30 +0.31 +0.32 



0.15 0.16 0.16 0.17 0.17 0.18 



+0.03 +0.03 +0.03 +0.03 +0.03 +0.03 



—0.03 —0.03 —0.04 —0.04 —0.04 —0.04 



0.10 0.10 0.10 0.10 0.11 0.11 



0.22 0.23 0.23 0.24 0.25 0.25 



-0.35 —0.36 

 0.47 0.48 

 0.59 0.61 

 0.71 0.73 

 0.82 0.84 



-0.37 —0.38 —0.39 —0.40 



0.49 0.51 0.52 0.54 



0.62 0.64 0.66 0.67 



0.75 0.77 0.79 0.81 



0.87 0.89 0.92 0.94 



-0.93 

 1.04 

 1.14 

 1.23 

 1.32 



-1.41 



1.48 

 1.55 

 1.61 

 1.67 



-1.72 

 1.75 

 1.78 

 1.81 

 1.82 



-0.96 

 1.07 

 1.17 

 1.27 

 1.36 



-1.45 

 1.53 

 1.60 

 1.66 

 1.72 



-1.77 

 1.81 

 1.84 

 1.86 

 1.87 



-0.98 

 1.10 

 1.20 

 1.30 

 1.40 



-1.49 

 1.57 

 1.64 

 1.71 

 1.77 



-1.82 

 1.86 

 1.89 

 1.91 

 1.93 



-1.01 

 1.13 

 1.24 

 1.34 

 1.44 



-1.53 

 1.61 

 1.69 

 1.76 

 1.82 



-1.87 

 1.91 

 1.94 

 1.96 

 1.98 



-1.04 —1.07 

 1.16 1.19 



1.27 

 1.38 

 1.48 



1.30 

 1.41 

 1.52 



-1.57 —1.61 

 1.66 1.70 



1.73 

 1.80 

 1.87 



1.78 

 1.85 

 1.91 



-1.92 —1.97 

 1.96 2.01 



1.99 

 2.02 

 2.03 



2.05 

 2.07 

 2.09 



Millibars 



900 950 1000 1050 



mb. mb. mb. mb. 

 +2.33 +2.46 +2.59 +2.72 

 2.33 2.46 2.59 2.72 

 2.31 2.44 2.57 2.70 

 2.28 2.41 2.54 2.66 

 2.24 2.37 2.49 2.61 



+2.19 +2.31 +2.43 +2.55 



2.13 2.25 2.36 2.48 



2.05 2.17 2.28 2.40 



1.97 2.08 2.19 2.30 



1.88 1.98 2.09 2.19 



+1.78 +1.88 +1.97 +2.07 

 1.66 1.76 1.85 1.94 

 1.55 1.63 1.72 1.80 

 1.42 1.50 1.58 1.65 

 1.28 1.36 1.43 1.50 



+1.14 +1.21 +1.27 +1.33 

 1.00 1.05 1.11 1.16 

 0.85 0.89 0.94 0.99 

 0.69 0.73 0.77 0.80 

 0.53 0.56 0.59 0.62 



+0.37 +0.39 +0.41 +0.43 



0.20 0.21 0.23 0.24 



+0.04 +0.04 +0.04 +0.04 



—0.04 —0.05 —0.05 —0.05 



0.13 0.13 0.14 0.15 



0.29 0.31 0.33 0.34 



—0.46 —0.48 —0.51 —0.53 

 0.62 0.65 0.69 0.72 

 0.78 0.82 0.86 0.91 

 0.93 0.99 1.04 1.09 

 1.08 1.15 1.21 1.27 



-1.23 

 1.37 

 1.50 

 1.63 

 1.75 



-1.86 

 1.96 

 2.05 

 2.14 

 2.21 



-2.27 

 2.32 

 2.36 

 2.39 

 2.41 



-1.30 

 1.45 

 1.59 

 1.72 

 1.85 



-1.96 

 2.07 

 2.17 

 2.26 

 2.33 



-2.40 

 2.45 

 2.49 



2.52 



2.54 



-1.37 —1.44 

 1.52 1.60 



1.67 

 1.81 

 1.94 



1.75 

 1.90 

 2.04 



-2.07 —2.17 

 2.18 2.29 



2.28 

 2.37 

 2.45 



2.40 

 2.49 

 2.58 



-2.52 —2.65 

 2.58 2.71 



2.62 

 2.66 

 2.67 



2.75 

 2.79 

 2.81 



—.070 —.072 —.075 —.078 —.080 —1.82 —1.88 —1.93 —1.98 —2.04 —2.09 —2.41 —2.55 —2.68 —2.81 



SMITHSONIAN METEOROLOGICAL TABLES 



