I did think of advising him to start a nursery for silk-worms at Clochegourde, where we have many mulberry-trees, remains of the old industry of Touraine.
In this paper, the near-infrared diffuse transmission spectra of 2386 silkworm (Bombyx mori) cocoons from the 4th day of cocooning to the 13th day before turning into moths were collected.