This was a libel for collision. The libelants were the owners of the ship Chancellor, which, on Sept. 29, 1862. was lying alongside the dock just below the navy yard, in Brooklyn, and was struck by the floating derrick, which was being towed away from the navy yard by the steam tug, and injured to about $2.-000. The testimony showed that the derrick had been employed by the government of the United States to do some lifting at the navy yard, and, having no motive power of her own. the government was to tow her there and away again. The same government offi-*1411eer who employed her also employed the si earn tug to tow her, and was himself on board the steam tug, and gave some directions about her navigation. The tide was so strong that the derrick was swept down upon the Chancellor, and, having no motive power, could do nothing to prevent it.

THE JUDGE held that on the evidence the derrick must be exonerated, and allowed the steam tug to be heard as to whether being in government employ made any difference with her liability.