A method of decreasing the rate of photoyellowing in paper containing mechanical pulp comprising: applying an aqueous solution containing an effective amount of one or more salts of thiocyanic acid on the surface of a paper sheet in a papermaking process. Some of the newly introduced top level domains provide information on a web sites location of operation. The second support floats relative to the disc upon a fluid receiving member such as an inflatable bellows. The facility searches the identified search zones for the selected visual features to determine the 2-dimensional locations at which the selected visual features occur. The assembly 12 may include a pair of movable mirror assemblies 34, 36 which selectively and respectively communicate with cameras 14, 16, thereby allowing the cameras 14, 16 to receive the desired and previously delineated images.