Wireless telegraphy with special reference to the quenched-spark system. This book, "Wireless telegraphy with special reference to the quenched-spark system. Volume 3", by Bernard John Leggett, is a replication of a book originally published before 1921. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.