After his father's death in 1879, Tesla found a package of letters from his professors to his father, warning that unless he were removed from the school, Tesla would die through overwork.
Setelah kematian ayahnya pada tahun 1879, Tesla menemukan paket surat dari profesor kepada ayahnya, mengingatkan bahwa kecuali dia dikeluarkan dari sekolah, Tesla akan mati akibat terlalu lelah bekerja.