throw in the bark

Etymology
From the fact that the bark of the cinchona tree is used to make the medicine quinine.

Verb

 * 1)  To administer quinine.
 * 2) * 1864 (Nov 5), E. Hare, "The treatment of malarious fever", The Medical Times and Gazette, Volume 2, page 487
 * An emetic was prescribed, a perspiration broke out, and I now, with an air of confidence, began to throw in the bark, quite sanguine in my expectations of soon checking this formidable disease.
 * 1) * 1864 (Nov 5), E. Hare, "The treatment of malarious fever", The Medical Times and Gazette, Volume 2, page 487
 * An emetic was prescribed, a perspiration broke out, and I now, with an air of confidence, began to throw in the bark, quite sanguine in my expectations of soon checking this formidable disease.