Mention four important *** inventions that transformed the history of the world.
Following **** inventions have changed the history of the world.*
*** first made paper from bark of old trees old rags and fishing nets.
The *** developed the art of block printing.
Seismograph was made in china to record earthquakes.
other notable inventions were Manufacuture of gunpowder, the mariner’* compass, the water mill, the wheelbarrow, umbrellas and kites.
