609 



TABLE 646.— REDUCTION OF BAROMETER TO STANDARD GRAVITY* 



METRIC MEASURES 



From latitude 0° to 45°, the correction is to be added algebraically. 



Lati- 

 tude 520 540 560 580 600 620 640 660 680 700 720 740 760 780 



mm mm mm mm mm mm mm mm mm mm mm mm mm mm 



—1.39 -1.45 -1.50 -1.55 —1.61 —1.66 — 1.71 -1.77 -1.82 -1.87 —1.93 —1.98 -2.04 -2.09 



5 —1.37 —1.42 —1.48 -1.53 -1.58 -1.64 — 1.69 -1.74 -1.79 —1.85 —1.90 -1.95 -2.00 -2.06 



6 1.36 1.42 1.47 1.52 1.57 1.63 1.68 1.73 1.78 1.83 1.89 1.94 1.99 2.04 



7 1.35 1.40 1.46 1.51 1.56 1.61 1.66 1.72 1.77 1.82 1.87 1.92 1.98 2.03 



8 1.34 1.39 1.44 1.49 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.91 1.96 2.01 



9 1.33 1.38 1.43 1.48 1.53 1.58 1.63 1.68 1.73 1.78 1.84 1.89 1.94 1.99 



10 —1.31 -1.36 —1.41 —1.46 -1.51 —1.56 — 1.61 -1.66 -1.71 -1.76 -1.81 -1.86 -1.92 -1.97 



11 1.29 1.34 1.39 1.44 1.49 1.54 1.59 1.64 1.69 1.74 1.79 1.84 1.89 1.94 



12 1.27 1.32 1.37 1.42 1.47 1.52 1.57 1.62 1.67 1.72 1.76 1.81 1.86 1.91 



13 1.25 1.30 1.35 1.40 1.45 1.50 1.54 1.59 1.64 1.69 1.74 1.78 1.83 1.88 



14 1.23 1.28 1.33 1.38 1.42 1.47 1.52 1.56 1.61 1.66 1.71 1.75 1.80 1.85 



15 —1.21 —1.26 —1.30 —1.35 —1.40 -1.44 — 1.49 —1.54 —1.58 —1.63 —1.67 —1.72 —1.77 —1.81 



16 1.19 1.23 1.28 1.32 1.37 1.41 1.46 1.50 1.55 1.60 1.64 1.69 1.73 1.78 



17 1.16 1.20 1.25 1.29 1.34 1.38 1.43 1.47 1.52 1.56 1.60 1.65 1.69 1.74 



18 1.13 1.18 1.22 126 1.31 1.35 1.39 1.44 1.48 1.52 1.57 1.61 1.65 1.70 



19 1.10 1.15 1.19 1.23 1.27 1.32 1.36 1.40 1.44 1.48 1.53 1.57 1.61 1.65 



20 —1.07 —1.11 -1.16 -1.20 —1.24 -1.28 — 1.32 —1.36 -1.40 -1.44 —1.49 -1.53 -1.57 —1.61 



21 1.04 1.08 1.12 1.16 1.20 1.24 1.28 1.32 1.36 1.40 1.44 1.48 1.52 1.56 



22 1.01 1.05 1.09 1.13 1.16 1.20 1.24 1.28 1.32 1.36 1.40 1.44 1.48 1.51 



23 .98 1.01 1.05 1.09 1.13 1.16 1.20 1.24 1.28 1.31 1.35 1.39 1.43 1.46 



24 .94 .98 1.01 1.05 1.08 1.12 1.16 1.19 1.23 1.27 1.30 1.34 1.37 1.41 



25 — .90— .94— .97—1.01—1.04—1.08 — 1.11—1.15—1.18—1.22—1.25—1.29—1.32—1.36 



26 .87 .90 .93 .97 1.00 1.03 1.07 1.10 1.13 1.17 1.20 1.23 1.27 1.30 



27 .83 .86 .89 .92 .96 .99 1.02 1.05 1.08 1.12 1.15 1.18 1.21 1.24 



28 .79 .82 .85 .88 .91 .94 .97 1.00 1.03 1.06 1.09 1.12 1.15 1.18 



29 .75 .78 .81 .84 .86 .89 .92 .95 .98 1.01 1.04 1.07 1.10 1.12 



30 _ .71- .74— .76— .79— .82— .85— .87- .90— .93- .95— .98-1.01-1.04—1.06 



31 .67 .69 .72 .74 .77 .80 .82 .85 .87 .90 .92 .95 .98 1.00 



32 .62 .65 .67 .70 .72 .74 .77 .79 .82 .84 .86 !89 .91 .94 



33 .58 .60 .63 .65 .67 .69 .72 .74 .76 .78 .80 .83 .85 .87 



34 .54 .56 .58 .60 .62 .64 .66 .68 .70 .72 .74 .76 .79 .81 



35 — .49- .51- .53— .55— .57— .59— .61— .63— .64— .66— .68— .70— .72 .74 



36 .45 .46 .48 .50 .52 .53 .55 .57 .58 .60 .62 .64 .65 .67 



37 .40 .42 .43 .45 .46 .48 .49 .51 .52 .54 .56 .57 .59 .60 



38 .36 .37 .38 .40 .41 .42 .44 .45 .46 .48 .49 .51 .52 .53 



39 .31 .32 .33 .34 .36 .37 .38 .39 .40 .42 .43 .44 .45 .46 



40 _ .26— .27— .28— .29— .30— .31- .32— .33- .34— .35— .36— .37— .38— .39 



41 .21 .22 .23 .24 .25 .26 .26 .27 .28 .29 .30 .30 .31 .32 



42 .17 .17 .18 .19 .19 .20 .21 .21 .22 .22 .23 .24 .24 .25 



43 .12 .12 .13 .13 .14 .14 .15 .15 .16 .16 .16 .17 .17 .18 



44 .07 .07 .08 .08 .08 .08 .09 .09 .09 .10 .10 .10 .10 .11 



45 _ .02 - .02 — .03 — .03 - .03 - .03 - .03 - .03 - .03 - .03 - .03 - .03 - .03 - .04 



{continued) 



* 980.665 cm sec- 2 



SMITHSONIAN PHYSICAL TABLES 



