Though we have not found the exact well understandable old manuscripts on historical Indian technologies,what we know is the mention of materials and
mixtures in proper quantities in use of Vimanas in engines and vimana's structures ,mention of mercury/sulphur based fuels and mention of Thrust in
those documents which was translated to english which is one scientific approach of ancient Indians.
Also we find mention of materials made of Anus and parmanus(Atoms and molecules).
These are the only absolutely minute things which we know properly about Indian science and technology.
But mention of these things in old Vedas is surprising.
edit on 21-5-2012 by Aman16 because: (no reason given)