'Messrs. Yarrow and Co. of Poplar, have just completed two little steel vessels, 30 ft. long by 8 ft. beam, for use on Lake Nyassa in the interior of Africa. The peculiarity of these boats is that they are entirely bolted together and not riveted, so that they can easily be subdivided into small and light pieces for transport on men's backs. This is the same mode of construction adopted by Messrs. Yarrow and Co. in the little steamer Ilala, which has been so successfully launched on Lake Nyassa.