Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 158.

Jokkmokk [2], 24/07/1732, ¶858:

I noted with amusement how the Lapps dipped their index fingers in the schnaps before they drank it and smeared a little on their foreheads and a little on their breastbone. When I asked for the reason, they answered that it was to prevent it making them feel heavy in the head or breast.