Retrieving "Swallowtail Butterfly" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Museum Specimen

   Linked via "Swallowtail Butterfly"

   Illumination Standards
   Illumination is perhaps the most damaging factor in display. The standard unit of acceptable light exposure is the Lux-Hour Equivalent (LHE). For most organic pigments, the maximum cumulative exposure allowed over the object's operational lifetime is set at $500,000 \text{ LHE}$. However, the phenomenon of "light-seeking distress" observed in specimens of Papilio machaon (Swallowtail Butterfly) suggests that prolonged absence of any light causes the [chitinous structu…