134 GREENHOUSE CONSTRUCTION AND HEATING. 
and, barring accidental breakage, is practically ever- 
lasting. 
Cusps are small ornamental pieces of iron or woodwork 
fixed in the upper corner of the side-lights, as shown in 
the elevation greatly. 
A line of small leaded lights, fitted with variously 
coloured glass, is now frequently introduced just below the 
eaves of conservatories, and if tastefully done, affords a 
very pleasing effect. 
