Table 44. 



REDUCTION OF TEMPERATURE TO SEA LEVEL. 



ENGLISH MEASURES. 



Rate of 

 decrease 



of 

 temper 

 ature. 



1°F. 

 for 



every 



Feet. 

 200 



205 

 210 



215 

 220 



230 



240 

 250 

 260 

 270 



280 



290 



300 

 310 

 320 



340 



360 

 3S0 

 400 

 420 



440 



460 

 4S0 

 500 

 520 



540 



560 

 580 

 600 

 620 



650 



700 

 750 

 800 

 850 

 900 



DIFFERENCES BETWEEN TEE TEMPERATURE AT ANY ALTITUDE 

 AND AT SEA LEVEI,. 



ALTITUDE IN FEET. 



100 200 300 400 500 600 



F. 



o?50 

 0.49 

 0.4S 

 0.47 

 o.45 



o.43 

 0.42 

 0.40 

 0.38 

 o.37 



0.36 



o.34 

 o.33 

 0.32 

 0.31 



0.29 

 0.28 

 0.26 

 0.25 

 0.24 



0.23 



0.22 

 0.21 

 0.20 

 0.19 



0.19 



0.18 

 0.17 

 0.17 

 0.16 



0.15 

 0.14 

 0.13 

 0.12 

 0.12 



O.I I 



F. 



i?oo 



O.98 

 0.95 

 0-93 

 O.9I 



O.87 

 O.83 

 O.80 

 O.77 

 O.74 



O.7I 

 O.69 

 O.67 

 O.65 

 O.62 



o-59 

 0.56 



o.53 

 0.50 

 0.48 



o.45 

 o.43 

 0.42 

 0.40 



0.38 



o.37 

 0.36 



o.34 

 o.33 

 0.32 



0.31 

 0.29 

 0.27 

 0.25 

 0.24 



0.22 



F. 

 i?5o 

 1.46 



1-43 

 1.40 

 1.36 



1.30 



1-25 

 1.20 



1. 11 



1.07 

 1.03 

 1. 00 

 0.97 

 0.94 



0.88 

 0.S3 

 0.79 



o.75 

 0.71 



0.68 

 0.65 

 0.62 

 0.60 

 0.58 



0.56 



o.54 

 0.52 

 0.50 

 0.48 



0.46 



o.43 

 0.40 



o.37 

 o.35 



o.33 



F. 

 2?00 



I 



i-43 

 1.38 

 i-33 

 1.29 



1-25 



1.1S 

 1. 11 

 1.05 

 1. 00 

 o-95 



0.91 

 0.87 

 0.83 

 0.80 

 0.77 



0.74 

 0.71 

 0.69 

 0.67 

 0.65 



0.62 

 o.57 

 o.53 

 0.50 

 0.47 



0.44 



F. 

 2?50 

 2.44 

 2.38 

 2-33 

 2.27 



2.17 

 2.08 

 2.00 

 I.92 

 I.85 



1.79 



i-73 

 1.67 

 1. 61 

 1.56 



1.47 



i-39 

 1.32 



1.25 

 1. 19 



1. 14 

 1.09 

 1.04 

 1. 00 

 0.96 



o-93 

 0.89 

 0.S6 

 0.83 

 0.81 



0.77 

 0.71 

 0.67 

 0.62 

 o.59 

 0.56 



700 800 



F. 



3?oo 



2-93 

 2.86 

 2.79 

 2-73 



2.61 

 2.50 

 2.40 

 2.31 

 2.22 



2.14 

 2.07 

 2.00 

 1.94 



1.S7 



1.76 

 1.67 

 1.5S 

 1.50 



1-43 



1.36 

 1.30 

 1-25 

 1.20 

 I- 15 



1. 1 1 



1.07 

 1.03 

 1. 00 

 0.97 



0.92 

 0.86 

 0.S0 



o.75 

 0.71 



0.67 



F. 

 3-50 

 3-4i 

 3-33 

 3.26 

 3- iS 



3- 04 

 2.92 

 2.80 

 2.69 

 2-59 



2.50 

 2.41 



2-33 

 2.26 

 2.19 



2.06 

 1.94 

 1.84 

 1-75 

 1.67 



i-59 

 1-52 

 1.46 

 1.40 

 1-35 



1.30 



1-25 

 1. 21 

 1.17 

 i- 13 



1.0S 

 1. 00 



o.93 

 0.87 



0.S2 



0.7S 



F. 



4?oo 

 3-90 

 3.81 

 3-72 

 3-64 



3-4S 

 3-33 

 3.20 

 3.08 

 2.96 



2.S6 

 2.76 

 2.67 



2.5S 

 2.50 



2-35 

 2.22 

 2.10 

 2.00 

 1.90 



1.82 

 1.74 

 1.67 

 1.60 

 i-54 



1.48 

 1-43 

 1.38 

 i-33 

 1.29 



1.23 

 1.14 

 1.07 

 1. 00 

 0.94 



.0.89 



900 I0C0 2000 3000 



F. 



4"53 

 4-39 

 4.29 

 4.19 

 4.09 



3-9i 



3-75 

 3.60 



3-46 



3.21 

 3.10 

 3.00 

 2.90 



2.81 



2.65 

 2.50 



2-37 

 2.25 

 2.14 



2.05 

 1.96 

 1.87 

 1.80 

 1-73 



1.67 

 1. 61 

 1-55 

 1.50 



i-45 



1.3S 

 1.29 

 1.20 

 [.12 

 1.06 



1. 00 



F. 



5?oo 

 4.88 

 4.76 

 4-65 

 4-55 



4-35 

 4.17 

 4.00 

 3-85 

 3-7Q 



3-57 

 3-45 

 3-33 

 3-23 

 3.12 



2-94 

 2.78 

 2.63 

 2.50 

 2.3S 



2.27 

 2. 17 

 2.08 

 2.00 

 1.92 



1.85 

 '•79 

 [.72 

 ..67 

 1. 61 



i-54 

 i-43 

 '•33 

 '•25 

 1.1S 



1. 11 



F. 



io?oo 



9.76 



9-52 

 9-3° 

 9.09 



8.70 



8.33 

 8.00 

 7.69 

 7.41 



7.14 

 6.90 

 6.67 



6-45 

 6.25 



5-SS 

 5-56 

 5.26 

 5.00 

 4.76 



4-55 

 4-35 

 4.17 

 4.00 

 3-85 



3-7Q 

 3-57 

 3-45 

 3-33 

 3-23 



3.0S 

 2.S6 

 2.67 

 2.50 

 2-35 

 2.22 



F. 

 I5-00 

 14.63 

 14.29 



13-95 

 13-63 



13.04 

 12.50 

 12.00 



n-54 

 11. 11 



10.71 



10.34 



10.00 



9.68 



9-37 



8.82 

 8-33 

 7.S9 

 7-5o 

 7.14 



6.S2 

 6.52 

 6.25 

 6.00 



5-77 



5-56 

 5-36 

 5-17 

 5.00 

 4.84 



4.62 

 4.29 

 4.00 

 3-75 

 3-53 



3-33 



4000 



5000 



F. 

 20?00 



19-51 

 19-05 

 18.60 

 I8.l8 



17-39 

 16.67 

 16.00 



15-38 

 14.S1 



14.29 

 13-79 

 13-33 

 12.90 

 12.50 



11.76 

 11, 11 



10.53 



10.00 



9.52 



9.09 

 8.70 



8-33 

 8.00 

 7.69 



7.41 

 7.14 

 6.90 

 6.67 

 6-45 



6.15 

 5-7i 

 5-33 

 5.00 

 4.71 



4-44 



Tabular values are to be added to the observed temperature to obtain 

 the temperature at sea level. 



Smithsonian Table*. 



82 



