Rubuta ci gaba don wannan sakin layi - Tsarin BA na raka'a masu amfani ya sami tallafi mai yawa na duniya, kuma an karɓa <unk> tare da sauye-sauye guda ɗaya mai mahimmanci <unk> ta Babban Taron Kasa da Kasa na Masu Wutar Lantarki
(Paris, 1881). Associationungiyar Burtaniya ta gina wakilcin kayan tarihi na ohm (tsawon tsayin igiyar juriya wanda ke da juriya na raka'a 109 CGS na juriya na lantarki, wato ohm ɗaya) yayin da taron ƙasa da ƙasa ya fi son hanyar aiwatar da za a iya maimaitawa a cikin dakunan gwaje-gwaje daban-daban a ƙasashe daban-daban. Hanyar da aka zaɓa ta dogara ne akan juriya na Mercury, ta hanyar auna juriya na ginshiƙan Mercury na ƙayyadaddun girma (106 cm × 1 mm2): duk da haka, tsayin ginshiƙan da aka zaɓa ya kusan millimeters 3 da yawa, wanda ya haifar da bambanci na 0.28% tsakanin sabbin kayan aiki da na'urorin CGS waɗanda aka ɗauka a matsayin tushen su.