 Cooper akatanga kufarira dzidzo yechikoro chokurera vana muna 1876, paakapinda Centennial ExpositionmuPhiladelphia ndokuona ratidziro yechikoro chevana inoratidzwa naRuth Burritt, mudzidzisi weBoston. Cooper akapedza kudzidziswa pachikoro cheBurritt chekudzidzisa vana vekuchikoro muPhiladelphia muna 1880 uye akatanga basa rake kwenguva refu semudzidzisi wechikoro chevana. 