Page [146]: changed "arrangment" to "arrangement" (the size and arrangement of the batteries and wires)
Page [146]: added comma "nails," ( ... chance contact with nails, staples, metal pipes or other wires ...)
Page [179]: changed "carboard" to "cardboard" ( ... for our purpose we will choose cardboard.)
Page [179]: changed "Tanstickor" to "Tãndstickor" ( ... double it to the form of a Tãndstickor match-box, ...)
Page [185]: suspected typo (unchanged) "Emmot" should perhaps be "Emmott" (... the electrical firms of Messrs. Blakey Emmot, ...)
Page [186]: changed "Leclanchè" to "Leclanché" ( ... polarizes much less quickly than the ordinary Leclanché.)
Page [187]: changed two instances of "Ampére" to "Ampère" in the index (Ampère, 55 / Ampère's law, 11)