??????????? "investigatory" ???? sound like snoop ........ tri tu figger out the kervs av... 1. power line wire sag down tween poles that hold it up . . . 2. kerv av the support wired av suspend bridj . . . 3. how astronomers get distans tu neerbi stars bi meashuer angel . . . ....6 months apart (half wae round sun) . . . 4. how Greeks around 200bc kalkulated erth radius bi look at sun . . . ....oenlee 3% off