American. Scientific Aewy Inventions, labor. Time Ball Signals. The empty molds The custom of dropping a ball accurately at are fed in at the left end of the machine where a given time has been adopted and carried out they are placed on a reciprocating. bed, I, at the Royal Observatory at… … Two molds are filled at each revolution of the servatory, at Albany, N. Y., have sent a mes- screw, G. The various parts of the apparatus Saw Set or Circular Saws, pressing roller. sage to the Mayor expressing adesire to supply are altached toa square block of wood, H, In the invention illustrated…
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