PLATES.

[I.]Chart shewing the situation of the Skerryvore Lighthouse.
[II.]Chart shewing the position of the Skerryvore Rocks and foul ground.
[III.]Plans of the Skerryvore Rock at high and low water of spring tides.
[IV.]Curves for Lighthouse Towers — Marine Dynamometer.
[V.]Barrack of timber on the Skerryvore Rock.
[VI.]Details of fixtures of timbers at the top of the Timber Barrack.
[VII.]Elevation of Skerryvore Lighthouse.
[VIII.]Section of Skerryvore Lighthouse.
[IX.]Balance Crane used at Skerryvore.
[X.]Plan shewing the Lighthouse Establishment of Barracks, Harbour, &c., at Hynish, in the Island of Tyree.
[XI.]Elevation and Section entrance to Dock at Hynish.
[XII.]Plan and Section of Annular Lens.
[XIII.]Perspective Elevation of Revolving Dioptric Apparatus of First Order.
[XIV.]Plan of Revolving Dioptric Light of First Order, with Mirrors.
[XV.]Vertical Section of fixed Dioptric Lights of First Order, with Mirrors.
[XVI.]Elements of Concave Mirrors for Dioptric Lights of First Order, and arrangement on the Frame.
[XVII.]Perspective View of Fixed Dioptric Light of First Order, with Catadioptric Zones.
[XVIII.]Vertical Section of Fixed Dioptric Light of First Order, with Catadioptric Zones.
[XIX.]Vertical Section of Catadioptric Light of Fourth Order, with Framing.
[XX.]Elevation of Mechanical Lamp for Dioptric Lights of First Order.
[XXI.]Enlarged Views of Oil-Pumps of Mechanical Lamp.
[XXII.]Enlarged Views of Oil-Pumps of Mechanical Lamp.
[XXIII.]Details of Clock-work of Mechanical Lamp.
[XXIV.]Details of Clock-work of Mechanical Lamp.
[XXV.]Flame of Mechanical Lamp of First Order at full size.
[XXVI.]Elevation of Diagonal Lantern, and details of Astragals.
[XXVII.]Elevation of Ardnamurchan Lighthouse.
[XXVIII.]Plan of Ardnamurchan Lighthouse.
[XXIX.]Lines of a Floating Light Vessel belonging to the Corporation of Trinity House of Deptford Strond.
[XXX.]Elevation of Covesea Skerries Beacon.
[XXXI.]Details of Covesea Skerries Beacon.
[XXXII.]Elevations and Sections of Stone and Iron Beacons.
[XXXIII.]Elevations of Buoys.