628 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



compounds, which must be used directly they are noticed, and are used 

 with safety at any time even when the trees are in flower. Red spider, 

 the attacks of which are observed at once from the marbled appearance 

 of the upper side of the leaves, thrives in a dry heat. It is kept down by 

 the syringe, used so as to force the water against the under surface of 

 the leaves, and by damping down the house, thus obtaining a moist 

 atmosphere. Syringing must be discontinued as soon as the fruit 

 colours. 



A single 4-inch hot-water pipe should run round the orchard-house to 

 enable one to keep out frost when the trees are in flower. A small-sized 

 saddle boiler is sufficient. 



There is much more to be said on this subject which cannot come 

 within the scope of a short article such as this ; but there is very little 

 difference to-day in the rules for the management of an orchard-house 

 from those given in my grandfather's book, which was first written in 

 1849 or 1850. 



There are at the present time (October 21) at Sawbridgeworth Plums 

 still on the trees of such varieties as ' Coe's Golden Drop,' 'Late Orange ' 

 (a splendid pot Plum), ' Grand Duke,' ' Monarch,' ' President,' 'Primate,' 

 &c, and of course many kinds of Apples and Pears are still not 

 gathered. 



