21. An even more hazardous device,popular in America,was the Instantaneous Light Box-a bottle filled with sulphuric acid into which splints treated with chemicals were dipped.

• 一种更冒险的设备在美国流行，那是个瞬间点燃的盒子-一个盒子里充满了硫磺酸化学药品浸泡处理过的夹板。