31. The reserves have been estimated at 6 billion tons, with an iron content of 2 billion tons. 32. The iron content gives both the reddish color and the coagulation of rust and accumulation of ferrous oxide. 33. During summer months, the falls give off a yellow glow due to high iron content in the waterbed. 34. Clay typically has a low-iron content and is formed into a shape gradually by hand on a wheel. 35. This depended on many factors including glaze composition, iron content and whether fired in reduced or oxidised conditions. 36. Water with a high iron content looks " rusty " and leaves an orange stain on sinks and tubs. 37. It says on the article that spinach doesn't make you stronger because of a miscalculation in its iron content . 38. Hand-held metal detectors are thrown off by the high iron content of many boulders where the debris was found. 39. To double the iron content in the rice, the research team added a ferritin gene derived from a French bean. 40. The water has a high iron content , which accounts for its apparent color and perhaps the reputed fertility for women.
