Gutenberg

Development Of Press

 Development of Press, Railway, Press and Telegraph, Industries in British India   Development of Press:- The first press in India was established by The Portuguese in 1550, first book was published by Portuguese missionaries (1557). The next was established by British in 1684. James Augustus Hickey is considered as the “father of Indian … Read more

Interior of earth,

  Most of the knowledge we have about Earth’s deep interior comes from the fact that seismic waves penetrate the Earth and are recorded on the other side.  Earthquake ray paths and arrival times are more complex than illustrated in the animations, because velocity in the Earth does not simply increase with depth. Velocities generally … Read more