div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader040fdocumentorgreader040viewer2022020522575067981a28ab0f07ac4239html5page1jpg target=_blank img data-url=documentthe-position-of-4-in-electromagnetic-unitshtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: The Position of 4π in Electromagnetic Units loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader040fdocumentorgreader040viewer2022020522575067981a28ab0f07ac4239html5thumbnails1jpg width=140 height=200 adivp© 1892 Nature Publishing Grouppdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader040fdocumentorgreader040viewer2022020522575067981a28ab0f07ac4239html5page2jpg target=_blank img data-url=documentthe-position-of-4-in-electromagnetic-unitshtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: The Position of 4π in Electromagnetic Units loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader040fdocumentorgreader040viewer2022020522575067981a28ab0f07ac4239html5thumbnails2jpg width=140 height=200 adivp© 1892 Nature Publishing Grouppdiv