IN this book some examples of plane motions of machines are worked out. The title well describes the scope and contents of the work and the very modest aims of the author. Velocity Diagrams. Their ...

THIS little work, in spite of its ponderous and somewhat ambiguous title, is a useful and workmanlike collection of curves from which may be obtained the value of the mean velocity v in the empirical ...

New observations from ESO’s Very Large Telescope show for the first time a gas cloud being ripped apart by the supermassive black hole at the centre of the galaxy. Shown here are VLT observations from ...