Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 113.
Jokkmokk, 05/07/1732, ¶574:
“Kappa-tialmas” or “kappi” is a Lappish dish. When the reindeer milk that is to be made into cheese gets warm and before the rennet is added, a skin forms on it. This is skimmed off with a spoon, put into a reindeer bladder or into a psalterium, hung up on the wall to dry, and then eaten. This is a delicacy to them and berries are often mixed into it.