“Mr. Marsden of Leeds … we illustrate a machine which has special interest for a large class of our readers. The machine is designed especially for ballasting railways, and it has long been known that stone or slag properly broken and screened is a most excellent material for such purposes, giving a close road free from dust, whilst the material is left in the best possible form for binding together. The illustrations show the most modern adaptation of the Blake stone breaker for this purpose. ..