REFERENCES.

X X X. DIAGONAL SUPPORTS FOR THE UPPER CATADIOPTRIC ZONES.
H H. SERVICE TABLE ON WHICH THE LAMP RESTS & WHERE THE KEEPER STANDS TO TRIM THE BURNER.
R R. DIAGONAL FRAME FOR CARRYING THE APPARATUS.

James Andrews, Delt. William Miller, Sc.

PLATE XVIII.

Stevenson’s Account of Skerryvore Lighthouse.

G. H. Slight Delt. W. H. Lizars Sculpt.

1st.
ORDER of LIGHTS.

FIXED
CATADIOPTRIC
APPARATUS.

PLATE XIX.