Table 181 



VISCOSITY OF GASES AND VAPORS 

 The values of n given in the table are io 6 times the coefficients of viscosity in c.g.s. units. 



213 



Substance. 



Acetone 



Air* 



Alcohol, Methyl. . . . 



Alcohol, Ethyl 



Alcohol, Propyl 



norm 



Alcohol, Isopropyl. . 

 Alcohol , B utyl, norm 

 Alcohol, Isobutyl. . . 

 Alcohol, Tert. butyl 

 Ammonia 



Argon 



Benzene 



Carbon bisulphide . 

 Carbon dioxide 



u it 



il 11 



Carbon monoxide. . 



Chlorine 



Chloroform 



Ether 



Substance. 



Ether 



Ethyl chloride. . 

 Ethyl iodide. . . 



Ethylene 



Helium 



It 

 CI 



Hydrogen 



Krypton 



Mercury 



u 



11 

 it 



Methane 



Methyl chloride 



Methyl iodide. . 

 Nitrogen 



Nitric oxide. . . 

 Nitrous oxide. . 

 Oxygen 



Water Vapor . . . 



Xenon 



Temp. 

 °C 



16. 



36 



o 



72 



15 



66 

 184 

 —20 



IS- 

 99.2 



182.4 

 302.0 



iS-o 

 270.0 

 300.0 

 3300 

 360.0 

 390.0 



20.0 

 0.0 



150 

 302.0 



44.0 



-215 

 o. 



10.9 

 53-5 



15-4 

 535 

 0.0 

 16.7 

 100. o 

 15- 



73-2 



79-3 



93-5 



216.0 



96.1 



189. 1 



196.9 



234.8 



269.9 



81.9 



86.7 



88.9 



io 5-9 

 121 .5 

 139.2 

 246. 

 489. t 

 532. t 

 5«2.t 

 627. f 

 671. f 

 120. 1 

 98.8 

 105.2 

 213.9 

 232. 



156.3 



166. 



170.7 



189.4 



179. 



138. 



189. 



195-7 



215-9 

 90.4 

 96.7 



132.0 



222. 



Refer- 

 ence. 



4 

 3 

 2 



5 

 5 



5 

 5 

 2 



10 

 2 

 2 

 2 



3 



7 



10 



7 



7 



10 



10 



10 



7 



7 



1 



1 



9 

 11 



1 Puluj, Wien. Ber. 69 (2), 1874. 



2 Breitenbach, Ann. Phys. 5, 1901. 



3 Steudel, Wied. Ann. 16, 1882. 



4 Graham, Philos. Trans. Lond. 1846, III. 



5 Schultze, Ann. Phys. (4), 5, 6, 1901. 



6 Schumann, Wied. Ann. 23, 1884. 



7 Obermayer, Wien. Ber. 71 (2a), 1875. 



8 Koch, Wied. Ann. 14, 1881, 19, 1883. 



9 Meyer-Schumann, Wied. Ann. 13, 1881 



10 Jeans, assumed mean, 1916. 



11 Rankine, 1910. 



12 Vogel (Eucken, Phys. Z. 14, 1913). For 



summaries see: Fisher, Phys. Rev. 24, 

 1904; Chapman, Phil. Tr. A. 211, 

 191 1 ; Gilchrist, Phys. Rev. 1, 1913. 

 Schmidt, Ann. d. Phys. 30, 1909. 



* Gilchrist's value of the viscosity of air may be taken as the most accurate at present avail- 

 able. His value at 20.2° C is 1.812 X io -4 . The temperature variation given by Holman (Phil. 

 Mag. 1886) gives \i = 1715.50 x io _7 (i + .00275J - .00000034/ 2 ). See Phys. Rev. 1, 1913. 

 Milhkan (Ann. Phys. 41, 759, 1913) gives for the most accurate value /x< = 0.00018240 - 

 0.000000493(23-/) when (23>/>i2) whence fj.20 = 0.0001809 ± 0.1%. For ^ he gives 

 0.0001711. 



fThe values here given were calculated from Koch's table (Wied. Ann. 19, p. 869, 1883) 

 by the formula \i = 489 [1 + 746(/ - 270)]. 



Smithsonian Tables. 



