Keeping food hot in 1922

You can gain such interesting insights from primary documents, actual old books and articles and other writing; this is a tiny series from the 1922 collection Kitchen Essays by Agnes Jekyll (the sister-in-law of the famous Gertrude the gardener)....

This harks back to the chafing dish type I shared a bit at http://favoritefoodthisweek.blogspot.com/search/label/chafing%20dishes ....

That long metal food-warmer with spirit lamps...whereon porridge, coffee, and hot dishes can be kept palatable is a great help....[Also] insist on...a small saucepan over a spirit lamp for boiling eggs.