14 



Table 1 



CONVERSIO 



(CONTINUED) 

 N FACTORS 



I. Pressure: (continued) 



1 kilogram per square centimeter 

 (kg. cm."*) 



= 98066S dynes cm; 1 

 = 980.665 mb. 

 = 735.596 mm. Hg. (45°) 

 = 735.559 mm. Hg. (stand- 

 ard) 

 = 28.9605 in. Hg. (45°) 

 = 28.9590 in. Hg. (stand- 

 ard) 

 = 14.2233 lb. in.° 



J. Force: 



1 gram weight 



= 980.665 dynes 

 1 kilogram weight 



= 9.80665 X 10 s dynes 

 1 newton 



= 10* dynes 



K. Energy, work: 

 1 erg 



= 1 dyne-centimeter 



= 10~ 7 abs. joule 



= 2.38844X10^ ITcal. 



= 2.3892 X10- 8 cal..s 

 1 absolute joule (abs. joule) 



= 10 7 ergs 



= 0.238844 ITcal. 



= 0.23892 cal.,i 

 1 kilogram-meter (kg.-m.) 



= 9.80665 abs. joules 

 1 International Steam Tables cal- 

 orie (ITcal.)* 



= 4.18684 X 10 7 ergs 



= 4.18684 abs. joules 



= 1.00032 caU 



= 8Wxl0i Iat - kw - hr - 



1 15° gram-calorie (cal.u)* 

 = 4.1855 abs. joules 



1 kilogram-calorie (Kcal.) 



= 10 3 gram-calories 



1 absolute kilowatt-hour (abs. kw.- 

 hr.) 



= 3.6 X 10' abs. joules 

 1 mean International kilowatt-hr. 

 = 1.00019 abs. kw.-hr. 

 = 860000 ITcal. 

 = 3.60068 X IV abs. joules 

 = 3412.756 Btu 



1 45° atmosphere 



= 1013.200 mb. 



= 1.03318 kg. cm." 2 



= 760 mm. Hg. (45°) 



= 29.9213 in. Hg. (45°) 



= 14.695 lb. in." 1 



= 759.962 mm. Hg. (stand- 

 ard) 



= 29.9198 in. Hg. (stand- 

 ard) 



= 0.999950 standard atmos- 

 phere 

 1 inch of water, 4° C. 



= 2.491 mb. 



1 pound weight 



= 32.174 poundals 



= 444822 dynes 

 1 poundal 



= 13825.5 dynes 



1 British thermal unit (Btu) 

 (The Btu used here is defined 

 by the relationship : 



1 Btu °F.-i lb.-i = l ITcal. "G-i 



= 251.996 ITcal. 

 = 252.08 cal.,« 

 = 1055.07 abs. joules 

 = 0.00029302 Int. kw.-hr. 

 1 foot-pound (ft.-lb.) 



= 1.35582 abs. joules 



* See Introduction, p. 4. 



SMITHSONIAN METEOROLOGICAL TABLES 



(continued) 



