612 



TABLE 647.— REDUCTION OF BAROMETER TO STANDARD GRAVITY (concluded) 



ENGLISH MEASURES 



From latitude 46° to 90°, the correction is to be added algebraically. 



^fje 19 20 21 22 23 24 25 26 27 28 29 30 



Inch Inch Inch Inch Inch Inch Inch Inch Inch Inch Inch Inch 



45 _.ooi —.001 —.001 —.001 —.001 —.001 —.001 —.001 —.001 —.001 —.001 —.001 



46 +.001 +.001 +.001 +.001 +.001 +.001 +.001 +.001 +.001 +.001 +.001 +.001 



47 .003 .003 .003 .003 .003 .003 .003 .004 .004 .004 .004 .004 



48 .004 .005 .005 .005 .005 .006 .006 .006 .006 .006 .007 .007 



49 .006 .006 .007 .007 .007 .008 .008 .008 .009 .009 .009 .010 



50 .008 .008 .009 .009 .010 .010 .010 .011 .012 .012 .012 .012 



51 +.010 +.010 +.011 +.011 +.012 +.012 +.013 +.013 +.014 +.014 +.015 +.015 



52 .011 .012 .012 .013 .014 .014 .015 .015 .016 .016 .017 .018 



53 .013 .014 .014 .015 .016 .016 .017 .018 .018 .019 .020 .020 



54 .015 .015 .016 .017 .018 .019 .019 .020 .021 .022 .022 .023 



55 .016 .017 .018 .019 .020 .021 .021 .022 .023 .024 .025 .026 



56 +.018 +.019 +.020 +.021 +.022 +.023 +.024 +.024 +.026 +.026 +.027 +.028 



57 .020 .021 .022 .023 .024 .025 .026 .027 .028 .029 .030 .031 



58 .021 .022 .023 .025 .026 .027 .028 .029 .030 .031 .032 .033 



59 .023 .024 .025 .026 .028 .029 .030 .031 .032 .033 .035 .036 



60 .024 .026 .027 .028 .029 .031 .032 .033 .034 .036 .037 .038 



61 +.026 +.027 +.028 +.030 +.031 +.033 +.034 +.035 +.037 +.038 +.039 +.041 



62 .027 .029 .030 .032 .033 .034 .036 .037 .039 .040 .042 .043 



63 .029 .030 .032 .033 .035 .036 .038 .039 .041 .042 .044 .045 



64 .030 .032 .033 .035 .036 .038 .040 .041 .043 .044 .046 .047 



65 .031 .033 .035 .036 .038 .040 .041 .043 .045 .046 .048 .050 



66 +.033 +.034 +.036 +.038 +.040 +.041 +.043 +.045 +.047 +.048 +.050 +.052 



67 .034 .036 .038 .039 .041 .043 .045 .047 .048 .050 .052 .054 



68 .035 .037 .039 .041 .043 .045 .046 .048 .050 .052 .054 .056 



69 .036 .038 .040 .042 .044 .046 .048 .050 .052 .054 .056 .058 



70 .038 .040 .042 .044 .046 .048 .050 .052 .053 .055 .057 .059 



71 +.039 +.041 +.043 +.045 +.047 +.049 +.051 +.053 +.055 +.057 +.059 +.061 



72 .040 .042 .044 .046 .048 .050 .052 .054 .057 .059 .061 .063 



73 .041 .043 .045 .047 .049 .052 .054 .056 .058 .060 .062 .064 



74 .042 .044 .046 .048 .051 .053 .055 .057 .059 .062 .064 .066 



75 .043 .045 .047 .049 .052 .054 .056 .058 .061 .063 .065 .067 



SMITHSONIAN PHYSICAL TABLES 



