14 THE FORCING GARDEN. 
of construction and economy, as well as for effect. The 
top layer of glass may be employed for single work, 
Fic. 8.—SECTIONAL VIEW OF METAL CLIP AND SCREW GLAZING WITHOUT PUTTY 
WITHOUT OUTSIDE REBATE. 
THE UNDER CLIP, MADE OF ZINC, 
SECTION OF THE BAR. 
Reference.—aaa, the rafter; BBB, the top clips and screw; ccc, the clips for 
under squares, nailed on the rebate, ‘D;’ EE, the groove in top of rafter to take 
any water; ff. the glass with the corner cut off, exactly as is shown at GG; and 
marked on the clip at ‘h,’ to admit of the screw, i. These cut corners come 
underneath the lap, k, except a piece to admit of the screw, and that is covered 
by the lower end of the clip, L. 
