Introduction. 



xli 



Table 19. — Observations to determine the Temperature Correction of the Bifilar Magnet. 



Gbttingen 

 Mean Time. 



Nov. 



h. m. 



13 

 55 



1 14 

 1 30 



1 48 



2 6 

 24 

 45 



1 



18 

 36 

 52 



8 

 24 

 41 



4 

 20 



Nov. 



23 17 



23 49 



8 



29 



45 



Tempera- 

 ture of 

 Bifihir 



Maguet. 



Magnet 



34-97 



57-60 



78-05 



60-72 



35-10 



57-80 



81-10 



59-50 



35-97 



57-55 



81-35 



59-05 



35-25 



69-65 



34-65 



Magnet 



Magnet 



33-65 



59-12 



80-60 



61-85 



35-30 



58-90 



77-50 



56-60 



34-50 



61-35 



83-50 



57-90 



35-75 



58-65 



78-75 



36-25 



68-30 



Magnet 



«-«„ 



i\way. 



22 

 20 

 17 

 25 

 22 

 23 

 21 

 23 

 21 

 23 

 22 

 23 

 34 

 35 



-63 

 •45 

 -33 

 -62 

 -70 

 -30 

 -60 

 -53 

 -58 

 -80 

 -30 

 -80 

 -40 

 -00 



Away. 



Away. 



25 



47 



21 



48 



18 



75 



26 



55 



23 



60 



18 



60 



20 



90 



22 



10 



26 



85 



21 



15 



25 



60 



21 



15 



22 



90 



20 



10 



42 



•50 



32 



05 



Away. 



Reading 



of 

 Uuifilar. 



Sc. Div. 



260 

 7 



10 

 10 

 10 



9 

 12 

 14 

 12 

 11 

 13 

 15 

 13 

 12 

 15 

 13 

 266 



265 



9 



10 



11 



10 



7 



9 



11 



9 



8 



10 

 12 

 10 

 9 

 10 

 13 

 10 

 12 

 264 



69 

 72 

 11 



85 

 06 

 33 

 05 

 63 

 88 

 96 

 55 

 77 

 84 

 54 

 40 

 14 

 39 



41 

 17 

 55 

 78 

 39 

 97 

 87 

 36 

 93 

 12 

 38 

 43 

 84 

 02 

 14 

 35 

 20 

 85 

 91 



Reading 

 of Declino- 

 meter 

 reduced 

 z=.r d. 



Sc. Div. 



153 

 154 

 154 

 153 

 154 

 155 

 156 

 156 

 156 

 157 

 157 

 157 

 157 

 157 

 157 

 158 

 158 



157 

 156 

 156 

 156 

 156 

 155 

 155 

 155 

 156 

 155 

 156 

 156 

 156 

 156 

 156 

 157 

 157 

 157 

 157 



86 

 20 

 69 

 86 

 25 

 17 

 28 

 73 

 56 

 05 

 09 

 58 

 03 

 78 

 92 

 49 

 76 



84 

 90 

 67 

 33 

 31 

 66 

 87 

 88 

 06 

 90 

 20 

 59 

 79 

 83 

 47 

 72 

 76 

 91 

 65 



minus 

 r {d-d). 



Bifilar. 



Reading 

 Corrected. 



Tliermo- 

 meter. 



— 1 



90 



- 1 



57 



— 1 



18 



— 1 



65 



— 1 



61 



-2 



13 



_ 1 



58 



— 1 



41 



_ 1 



55 



— 1 



73 



— 1 



38 



-2 



05 



-2 



72 



-2 



83 



-1-61 

 -1-57 

 -1-37 

 -1-77 

 -1-69 

 -1-48 

 -1-61 

 -1-65 

 -1-96 

 -1-66 

 -1-79 

 -1-86 

 -1-48 

 -1-96 

 -3-19 

 -2-50 



Sc. Div. 



149-21 

 150-07 

 150-99 

 15118 

 151-28 

 151-30 

 152-71 

 154-43 

 155-13 

 155-64 

 154-66 

 155-78 

 155-77 

 155-67 

 155-31 



149-65 

 150-18 

 150-60 

 150-92 

 151-86 

 152-62 

 152-82 

 153-13 

 153-11 

 153-52 

 153-78 

 152-51 

 150-84 

 152-76 

 152-75 

 151-65 

 153-49 



36-7 

 36-8 

 36-9 

 37-0 

 37-2 

 37-5 

 37-8 

 37-9 

 38-1 

 38-4 

 38-6 

 38-7 

 38-8 

 38-8 

 38-9 



38-1 

 38-2 

 38-5 

 38-6 

 38-7 

 38-8 

 38-8 

 38-9 

 38-9 

 39-0 

 39-0 

 39-1 

 39-2 

 39-4 

 39-6 

 39-7 

 39-8 



-Q- 



■0-000326 

 ■0-000296 

 ■0-000274 

 •0-000258 

 •0-000283 

 • 0-000352 

 -0-000311 

 ■0-000246 

 -0-000282 

 ■0-000342 

 -0-000258 

 -0-000344 

 -0-000315 

 -0-000319 



-0-000245 

 -0-000285 

 -0 000293 

 -0-000271 

 -0-000275 

 -0-000312 

 -0-000308 

 -0-000295 

 -0-000285 

 -0-000306 

 -0-000265 

 -0-000329 

 -0-000236 

 -0-000385 

 -0-000291 

 -0-000294 



49. The mean of the partial results, November 9, is Q= 0-0002979. 



10, is Q=0-0002915. 



The mean of all the partial results is Q= 0*0002945. 



Correction for the expansion of the silver wires and brass grooved wheel is 

 0-000010 (No. 32.), whence the adopted value, 



^=0-000304. 



MAG. AND MET. OBS. VOL. I. I 



