The corruptions of Christianity considered as affecting its truth. A sermon, preached before The Society in Scotland for Propagating Christian Knowledge; At Their Anniversary Meeting In The High Church Of Edinburgh, On Thursday, June 2. 1791. By Alexander Gerard, D. D. F. R. S. ED. Professor Of Divinity In King's College, Aberdeen, One Of His Majesty's Chaplains In Ordinary In Scotland. To which is added, an appendix, containing an abstract of the Proceedings of the Society from September 1. 1790.