292 Mr. N. Eumorfopoulos on the Determination 



Rod III. (a inch).— Diam. = -9654 cm. Density = 8'49. 

 Specific electrical resistance = 7*71 x 10" ohms. 

 12 cms. between junctions. Time-period 30 min. 

 Determination of temperature every minute. 



Set I. 





Set 



II. 



Set III. 



(Mean of 3 cycles.) 



(Mean of 2 cycles.) 



(Mean of 3 cycles.) 



Excess Temperature 



Excess Temperature 



Excess Temperature 



in degrees. 





in degrees. 



in degrees. 



Time in 



A. 



B. 



A. 



B. 



A. 



B. 



mins. 

 

 1 















3085 



13-15 



30-83 



13-21 



3015 



1302 



2 



2596 



13-32 



26-20 



13-38 



25-59 



13-18 



3 



20-86 



1305 



21-15 



13-14 



20-57 



12-92 



4 



16-75 



12-35 



17 09 



12-45 



16-54 



12-19 



5 



13-52 



11-36 



13-91 



11-47 



13-41 



1119 



6 



11-19 



10-31 



11-51 



1041 



1104 



1015 



7 



9-28 



9-27 



955 



9-34 



911 



915 



8 



7-80 



827 



7-96 



8-34 



7-62 



8-15 



9 



6-57 



732 



674 



7 45 



6-37 



726 



10 



563 



651 



5-66 



6-63 



5-35 



6-51 



11 



4-80 



5-77 



4-81 



5-85 



4-50 



5-72 



12 



4-10 



517 



411 



5-17 



3-81 



506 



13 



3-60 



4-64 



3-55 



4-60 



3-25 



4-49 



14 



311 



412 



307 



4-12 



2-75 



3-97 



15 



— 



— 



— 



— 



— 



— 



16 



2-65 



3-34 



2-44 



3-28 



216 



319 



17 



667 



307 



659 



3-03 



6-29 



2-92 



18 



12-19 



3-21 



1228 



315 



H-91 



3-03 



19 



16-75 



3-87 



16-85 



3-81 



16-44 



3-67 



20 



20-23 



4-93 



20-25 



4-88 



19-79 



4-71 



21 



22-83 



610 



22-81 



603 



22-40 



5-85 



22 



24-87 



7-24 



24-85 



717 



24-39 



7-08 



23 



26-45 



8-28 



26-43 



8-25 



25-97 



8-07 



24 



27-70 



9-21 



27-56 



9-17 



2713 



908 



25 



28-68 



10-03 



28-44 



10-04 



27 90 



9-89 



26 



29-55 



10-82 



29*22 



10-76 



28-69 



10-62 



27 



30-10 



11-37 



30-04 



11-30 



29-25 



11-24 



28 



30 56 



11-91 



30-31 



11-84 



29-80 



11-75 



29 



30-97 



1237 



30-77 



12-35 



30-17 



12-19 



TeTp. } 30 ° 



21° 



31° 



22° 



sir 



23° 



Mean ] j. : 

 Temp. Air. ] 



> c 



14 



.0 



i 



5° 



From which by calculation we get : — 



Conductivity 

 (from 1st sine term) . 



Set I. 

 •2374 



Set II. 



•2386 



Set III. 

 •2399 



Emissivity : — 

 From "a" term. 



1st sine term. 



•000208 

 •000251 



•000208 

 •000237 



•000205 

 •000237 



Set I. is the best of the three. 



