The county auditor shall keep as a permanent record in his office a book to be known as the "Abatement Book," to be furnished to him by the Comptroller General, wherein the county auditor shall enter separately each and every abatement of taxes granted and allowed. Such abatement book shall be so kept as to show in each case, under appropriate columns, the number of the page and the number of the line of the tax duplicate where the item abated appears, the name of the taxpayer, the amount and kind of tax charged on the duplicate and for what year, the amount abated and date of abatement, in each case, if the tax be on property, a description of property and the reason why the abatement was applied for and allowed. After the abatement papers are so entered, they shall be filed in the auditor's office by consecutive numbering of each and the number on the abatement paper shall be entered in the abatement book where the paper is entered so there may be easy reference thereto. Such abatement book shall be kept by townships and summed up separately for each fiscal year, with a recapitulation showing at the end of the year the amount of State, county, school, poll and other tax abated during the fiscal year in the whole county. The abatement allowed in annual settlements between county auditor and treasurer shall be according to the record in such abatement book.