Drosophila.

Of weighted glass the chamber held the fly;
the rubber tubes were fed from poisons measured;
organic gas was freed to travel hither
while stopwatch counted down.

From center chamber choosing left by scent;
the fly was bred for weeks just to forget
In moments ether would asphyxiate.

A notebook full of figures tracked the clock
For calculated time of death, and yet,
the handiwork of God was still the weight.