The fruit of the tree Pyrus cydonia or Cydonia Vulgaris. It is formed like the apple in some varieties or pear-shaped in others. It has a rich yellow or orange colour, with an agreeable odour, but if stored in quantity for some time it acquires a strong disagreeable smell. In Eastern countries the fruit ripens sufficiently to be eaten raw but European quince has to be cooked with sugar before use. The flavour of the apple tarts or jam is much improved by the addition of a small proportion of quince. Alone the fruit is made into an excellent marmalade.
From The Baker’s ABC by John Kirkland, formerly Head Teacher of National School of Baking, published 1927 by Gresham