Replacing the spark plug Now coming to the current situation, my car was due for spark plug replacement as it had already done 15k km and this is the time interval I have kept changing my plugs ...

This article was originally published with the title “Compound and Self-Acting Plug Valve for Wash Basins” in Scientific American Magazine Vol. 51 No. 4 (July 1884), p. 50 doi:10.1038 ...