Hi. Engr Justin. We have ...

Published June 23, 2018 04:52 by Ajit Seshadri Seshadri, Er.

Hi. Engr Justin.

We have heard of miners use a Canary Bird in spaces to test for foul gases, if not right.. the bird starts chirping .. thennit is QED thatcall is notcwell.. similarly there could be a variation of bio- assay test tobindicate potabilitybor pleasantness in taste etc.. well wishes ..