The train, minus the three abandoned trucks, again proceeded at a slow pace, with a pump trolley doing pilot ahead ; this was very necessary as a great many sleepers were found to have been burnt underneath the fishplates.

And introducing “Something Is Squeezing My Skull,” the muscley, two-and-a-half-minute whine that will be his next single in England, he seemed almost fatalistic.

It is slightly believable because the stairs are all riot stairs. In other words the stairs are all diagonal so if you walk straight up them you run into a wall.

One encounters a similar situation in homology theory. Beside singular homology, which is a homotopy invariant, and Čech homology, which is a shape invariant, there exists strong homology, which is a strong shape invariant. In the special case of metric compacta, this homology was introduced by N.E. Steenrod in 1940 and is often referred to as the Steenrod homology.