Show important invention j our OA attention has been caved to the recent jn provement pro in the manufacture of iron iron invented by mr bichard richard montgomery of new york which promise to constitute a new era in in that branch hi anch of the ne chadic arts the invention is is partially equivalent to the discover disc of f a new ew metal of manifold nore strength than iron iron tor for such purposes as bridges ac it consists in in the simple application of the amelto ancl tp the manufacture of iron iron the iron iron being rolled in in corrugations instead of a plane and possesses possesses bi m aidi tion to the strength imparted to the metal many ilir partial advantages such as economy of space and ei p pense in in the construction of boilers ac mr montgomery employs arches of corrugated plates tand and cylindrical indr ical corrugated flues it is is evident thata that a g extension of heating I 1 surface is is thus obtained and ps ex pen peri ments made in in new york have demonstrated that an explosion is is almost impossible the numerous iron iron stays in in the main main or stationary boiler and the ana gle p le braces and ribs of the fire are arch I 1 of the locomotive are dispensed with entirely various subordinate ad vantages are derived from this invention blisters in ai boiler plates are aie readily detected the boer abler is is cleansed with ease the disuse of the stays prevents checol lection of scales and the leakiness leak mess produced by the action of heat on the metal the cost of construction is is decreased impairs are less frequent and at less expense pe se and aid the space occupied by the steamboat boiler is i reduced deduced one third to one halt the corrugated plates are aie united with boiler boll sand ersland flues with the flut ings ggs running in the direction of the curve thus presenting sn tin a series of arches of great strength this thi s interesting invention is of equal utility for bridges g girders orders nr ders beams ac A bridge can be constructed ted with the arched corrugated iron iron at one fifth the expense and oi of less than one eighth the weight of the iron iron bridges now in in use and will sustain at least ten times the weight an ordinary bridge 20 to 30 feet long can be laid in m a day the simplicity of the invention is is its greatest recommendation we would particularly recommend it to the attention of engineers and directors of railroads for its economy and usef usefulness ulness iron beams and girders made of the corrugated iron of one drie third the thickness and one tenth the weight of bf those now in use will resist a greater pressure and at a greatly decreased expense A hint to builders is sufficient weekly I 1 |