This section is from the book "The Gardener V1", by William Thomson. Also available from Amazon: The New Organic Grower: A Master's Manual of Tools and Techniques for the Home and Market Gardener.
Were we constructing a fruit-room, we would build it with a north aspect, put a slate roof on it, and having the joists deep, lathed and plastered inside, and built with either thick stone or hollow brick walls. If the roof were thatched over with straw or heather, all the better - all this to keep up an equable temperature of 45°, according to the weather. There should be means of ventilation at the highest point of the roof, but there should be no currents of air passing through. As to the exclusion of light there are different opinions. If the window or windows are to the north, and as they should not be large, it does not, in our opinion, much matter about excluding light. There should, however, be shutters in the windows to shut at pleasure, to regulate temperature in cold weather. A fruiterer once told us that he found Apples keep best in a dry cellar in bushel-baskets. In such a place the temperature and the state of the atmosphere as to moisture would be subject to little fluctuation.
This is an important subject, for next to growing the fruit, the keeping of it in good order must always rank in importance. Perhaps some of our readers will favour us with their ideas and experience in the matter.