:Some India discoveries

:a-Choerer, iron and mercury

In 1899, the Bengali physicist Jagdish Chandra Bose announced the development of an "iron-mercury-iron coherer with telephone detector" in a paper presented at the Royal Society, London. He also later received U.S. Patent 755,840, "Detector for electrical disturbances" (1904), for a specific electromagnetic
. receiver   

:b-Crescograph   

The crescograph, a device for measuring growth in plants, was invented in the early 20th century

. by the Bengali scientist Jagdish Chandra Bose 

c-Stupe

 



The origin of the stupa can be traced to 3rd century BCE India. It was used as a commemorative monument associated with storing sacred relics.The stupa architecture was adopted in Southeast and East Asia, where it evolved into the pagoda, a Buddhist monument used
 .for enshrining sacred relics