Patent for an upright cylindrical cistern made from sheet-metal. This patent "consists in the application to and around the upper open end of the cistern and also if desired at different places around the body of the cistern, of a strengthening ring made of either wrought iron or steel or other suitable metal tubing or piping, to stiffen the cylindrical cistern, said piping or tubing being suitably fastened to the cistern and being arranged around the outside or inside of the same, but preferably around the outside and closely hugging said cistern" (lines 10-20).