Oil extracted simply by expression is less purgative than that obtained by treating the seeds with Bisulphide of carbon and absolute alcohol; also less purgative than the seeds themselves, because it contains only a very small proportion of a drastic principle existing exclusively in the seeds; this principle is completely dissolved in the oil extracted by chemical process.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera
Bisulphide of carbon was found to do it instantly.
"Edison, His Life and Inventions"
Frank Lewis Dyer and Thomas Commerford Martin
If infested specimens are received, these should be inclosed in a tight box and treated with Bisulphide of carbon before being added to the general collection, and it is always well for those who are receiving pinned specimens by exchange or otherwise to keep a quarantine box of this kind on hand.
"Directions for Collecting and Preserving Insects"
C. V. Riley