Show Charting Chara tin River Bottoms I t t An Ingenious apparatus for drawing the profile of a river bottom Is 18 used by Italian I engineers It consists of a ft wheel affixed to the tho bottom of ot a graduated rod which Is I fastened vertically at the side Bide of a boat In ID IDI I such a manner that as the boat advances up or down or across stream the tho wheel ati at i ithe ithe 4 I the end of ot the rod runs continually upon j t I the bottom the rod rising and falling with variations of the level Icel By noting the depth I at chosen intervals of ot time the elements are arc obtained for tracing an accurate te I i ii f i of ot all aU the tho of the bot hot boti i tom of or the river and the variations of or depth In the saving of or time this simple j apparatus possesses an enormous advantage i I over the ordinary method of soundings I I |