How did washington roebling got sick while making brooklyn bridge?

In 1870, Washington Roebling, the tower will be built on the bridge trying to haul in the underwater room was seven and bedridden. My wife was taken from Emily Warren as chief engineer of the bridge thanks to the struggle of the Roebling duty and his wife continued to head the engineering task unofficially, he bridges checked by watching from the bed of the building and provides a link between the construction area through his wife.
The opening day of the holiday was declared Bridge in New York City, that day is said that through water 1 150 300 center at the bridge of the foot. This bridge built in the Gothic style, the culmination of the 19th century engineering and has been recognized as the 8th wonder of the world.