1. foreign substance found in the filter 2. a mixture of Iron sesquioxide 3. a mixture of mineral and Iron sesquioxide 4. a piece of metal like fragment 5. a mixture of carbon 6. a mixture of brass and iron
(1) The foreign objects gathered on the filter (2) The mixture of iron sesquioxide (3) The mixture of minerals and iron sesquioxide (4) metal-like objects (5) The mixture of carbon (6) The mixture of brass and iron