WOOD PAVING BLOCKS The round, untreated white cedar block was very largely used for paving in Northern cities many years ago, but it developed so many defects that wood paving came very much into disrepute. Within the last few years, the introduction of sawed, rectangular creosoted blocks has given such excellent results that they are rapidly becoming a most popular pavement throughout the United States, and especially where traffic is heavy or where a clean and comparatively noiseless pavement is desired. A well-creosoted block does not decay; and, if set upon a solid concrete foundation with a good sand cushion, the wear, even under the heaviest traffic, is very little, because the ends of fibers which are exposed simply mat down and do not shatter as do stone or brick. It is estimated that there are more than ten million square yards of streets paved with wooden blocks in the United States, and the total is rapidly increasing. The wood most largely used, because of its general availability, is longleaf pine; but Norway pine and tamarack have also been used for some time with good results, and there is a strong disposition on the part of paving engineers to experiment with numerous other woods. So, doubtless, the list will be much extended.