Electrical Resistances of Metallic Wires. 

 Magnesium Wires. 



443 



No. 1. Length at commencement 

 = 55 08 inches. 



1st Series. 



Resist- 

 ance. 



•29195 

 60 

 210 

 75 

 225 

 98 

 255 

 145 

 265 

 155 

 280 

 180 

 303 

 178 

 277 

 186 

 284 

 185 

 292 

 205 

 295 

 205 

 285 

 225 

 327 

 237 

 345 

 250 

 362 

 265 

 377 

 314 

 434 

 355 

 438 

 3C6 

 445 

 385 

 458 

 390 

 462 

 397 

 468 



Differ- 

 ence. 



-•00135 

 + •00150 

 -•00135 

 + 00150 

 -•00127 

 + •00157 

 -•00110 

 + •00120 

 -00110 

 + •00125 

 -■00100 

 + •00123 

 -•C0125 

 + •00099 

 -•00091 

 + •00098 

 -•00099 

 + •00107 

 -•00087 

 + •00090 

 -■00090 

 + •00080 

 -■00060 

 + •00102 

 - -00090 

 + •00108 

 -•00095 

 + •00112 

 -■00097 

 + •00102 

 -00063 

 + 00120 

 -•00079 

 + •00083 

 -•00072 

 + 00079 

 -•00060 

 + ■00073 

 -•00068 

 + 00072 

 -•00065 

 + ■00071 



2nd Series. 



I Eesist- 

 i ance. 



Eested here 21 

 hours; resistance 

 rose to -29488; 

 showing gain by 

 standing of -00020. 



■29488 

 384 

 525 

 410 

 555 

 427 

 567 

 445 

 567 

 435 

 565 

 465 

 575 

 473 

 585 

 482 

 594 

 488 

 605 

 496 

 610 

 505 

 617 

 505 

 620 

 525 

 625 

 535 

 622 

 545 

 645 

 547 

 647 

 566 

 660 

 573 

 667 



Differ- 

 ence. 



00104 

 + -0014L 

 •00115 

 •00145 

 -•00128 

 + •00140 

 -•00122 

 + •00122 

 -•00132 

 + •00130 

 -•00100 

 + •00110 

 -■00102 

 + •00112 

 -•00103 

 + 00112 

 -■00106 

 + 00117 

 -•00109 

 + •00114 

 -•00105 

 + •00112 

 -•00112 

 + •00115 

 -00095 

 + •00100 

 -•00090 

 + •00087 

 - -00077 

 + •00100 

 -■00098 

 +-001C0 

 -•00081 

 + •00094 

 -•00087 

 + •00094 



Eested here 21 

 hours ; gained 

 00021. 



!No. 2. Length at commencement 

 =86 inches. 



1st Series. 



Eesist- 

 ance. 



44079 



3815 



4148 



3933 



4216 



3991 



4245 



4023 



257 



062 



272 



091 



300 



126 



325 



168 



230 



088 



248 



081 



251 



089 



250 



084 



245 



085 



246 



100 



249 



112 



251 



Differ- 

 ence. 



- -00264 

 + -00333 

 -00215 

 + -00283 



- -00225 

 + •00254 



- -00222 

 + •00234 

 -•00195 

 + •00210 

 -•00181 

 + •00209 

 -•00174 

 + •00199 

 -•00157 

 + •00062 

 -•00142 

 + •00160 

 -•00167 

 + •00170 

 -•00162 

 + •00161 

 -•00166 

 + •00161 

 -•00160 

 + •00161 

 -•00146 

 + -00149 

 -•00137 

 + -00139 



Eested here 18 

 hours ; gained by 

 standing -00061. 



2nd Series. 



Eesist- 

 ance. 



•44312 

 148 

 368 

 205 

 404 

 232 

 381 

 223 

 385 

 231 

 386 

 235 

 380 

 242 

 381 

 241 

 384 

 246 

 381 

 242 

 380 

 241 

 376 

 244 

 368 

 239 

 370 

 241 

 368 

 240 

 354 

 242 

 350 

 235 

 351 

 239 

 344 

 238 

 341 

 237 

 342 



Differ- 

 ence. 



00164 

 + -00220 

 - -00163 

 + •00199 

 -•00172 

 +.00149 

 -•00158 

 00162 

 00154 

 + •00155 

 -•00151 

 + •00145 

 -•00138 

 +-C0I39 

 -•00140 

 + •00143 

 -•00138 

 + •00135 

 -•00139 

 + •00138 

 -•00139 

 + •00135 

 -•00124 

 + -00129 

 - -00129 

 + -00131 

 -•00129 

 + •00127 

 -•00128 

 + •00114 

 •00112 

 + •00108 

 •00115 

 + •00116 

 •00112 

 •00105 

 ■00106 

 00103 

 •00104 

 •00105 



+ 



Eested here 26 

 hours; gained by 

 standing '0003. 



2G2 



