100 On Healituj Pineries and Pine-Pits. 
planted upwards of 43 years. The length from one extremity to the 
other, is ninety-nine feet, and it increases annually from two to three 
feet. Since I have had the management of it, (which is eight years,) it 
has grown in length twenty feet ; it is not more than six feet in height, 
and the circumference of the stem about four feet. It is an enormous 
bearer, and an excellent fruit, but more adapted for the kitchen than for 
eating, as it grows to a large size. Another very remarkable feature, 
which I must not omit, is, that on one side of the tree, three branches in- 
variably bear fruit only on alternate seasons ; so that the branch bearing 
the present year, will next season be destitute of fruit, and in the same 
manner, the branches bearing next year, will rest the year following. 
1 am, Gentlemen, 
Dover idge Gardens, ( Yours, &c. 
J«t^j/9</i, 1831. S Thos. DovEY. 
P.S. 1 have been induced to send you the above account, in order that 
some of your Physiological Correspondents may, through the medium of 
your Magazine, enable us to ascertain the cause of so extraordinary a 
phenomenon. 
Article III. — An accviuU of Heatlnrj a Pinery and Pine- 
Pit, at Sir Edward Dodswortli's, Bart., Nealand-Park, 
near IVakrfield. By Mu. .John Lister, Gardener 
there. 
Gkntlemkn, 
After perusing the tirs^t number of your Horticultural Re- 
gister, with very great pleasure, I sit down to attend to your Avislies, 
(and my duty) as expressed in your introductory remarks, and having 
very recently, made some alterations in the mode of heating a Pinery 
and Pit, at this place, which fully answers my expectations, I herewith 
send you a description and })lan of the improvement. 
My object, in the alterations I have made, was with a view to dis- 
pense with bark or leaves as a medium of heating the pit for pine 
plants, and at the same time to heat the house with hot water. In 
consequence of the form of the house, (which had been erected a number 
of years) I was not able to fix the hot-water pipes in those situations 
in the house, which I desired ; I shall therefore in the following detail, 
gi^e a description for heating the pit, according to the plan I have 
adopted, and for heating the house as I should have wished, had the 
form of the house admitted of it. 
The boiler, A, [Fig. 14] is two feet square to the angles, with a top 
rising five mches in the centre, as B ; that part of the boiler above the 
