Account of the Skerryvore lighthouse

EDINBURGH:
PRINTED BY NEILL AND COMPANY, OLD FISHMARKET.

PLATE I

Eng^d. by W. & A. K. Johnston Edin^r.

CHART
Shewing the Situation of the
SKERRYVORE LIGHTHOUSE

Stevensons Account of Skerryvore Lighthouse

PLATE II.

Engraved by W. & A. K. Johnston Edinburgh.

CHART
of the POSITION of the
SKERRYVORE ROCKS
& FOULGROUND
from a Survey made for the
COMMISSIONERS OF NORTHERN LIGHT HOUSES
JAMES RITSON SURVEYOR
1846.

Stevenson’s Account of the Skerryvore Lighthouse.

PLATE

Stevenson’s Account of Skerryvore Lighthouse.

James Andrews, Del^t. William Miller, Sculp^t.

PLAN of SKERRYVORE ROCK
AT LOW WATER OF SPRING TIDES.
Shewing the site of the Lighthouse Tower, Barracks, Cranes, fresh Water Tanks, Railway &c.

N^o. III.

Stevenson’s Account of Skerryvore Lighthouse.

James Andrews, Del^t. William Miller, Sculp^t.

PLAN of SKERRYVORE ROCK
AT HIGH WATER OF SPRING TIDES.

PLATE IV.

Stevenson’s Account of Skerryvore Lighthouse.

James Andrews, Del^t. G. Aikman Sc

CURVES FOR LIGHTHOUSE TOWERS

PARABOLA CONCHOID LOGARITHMIC HYPERBOLA

W. & A. K. Johnston Sculp^t.

MARINE DYNAMOMETER, SMALL SIZE, LENGTH 18 INCHES.

PLATE V.

Stevenson’s Account of Skerryvore Lighthouse.

Walter Ferrier Del^t. G. Aikman Sculp^t.

TEMPORARY BARRACK.

Barrack Room for Workmen
Engineer & Foreman’s Apartments
Kitchen & Provision Store
Store for Coals &c.

PLATE VI.

Stevenson’s Account of Skerryvore Lighthouse.

Walter Ferrier Del^t. G. Aikman Scupl^t.

Elevation
Fig. 1

TEMPORARY BARRACK.
TOP FIXTURES.

Plan
Fig. 2

PLATE VII.

Stevenson’s Account of Skerryvore Lighthouse.

James Andrews, Del^t. William Miller, Sculp^t.

ELEVATION.

PLATE VIII.

Stevenson’s Account of Skerryvore Lighthouse.

James Andrews, Del^t. William Miller, Sculp^t.

SECTION.

84^th. Course 94^th. Course

32^d. Course 28^th. Course

1^st. Course 19^th. Course

PLATE IX.

Stevenson’s Account of Skerryvore Lighthouse.

G. H. Slight Del^t. W. H. Lizars Sculp^t.

BALANCE CRANE USED AT SKERRYVORE.

Elevation

Plan

Section shewing Rollers

Plan of Rollers

Plan of Pedestal & Frame Circle

End view of Crane

PLATE X.

Engraved by W. & A. K. Johnston, Edinburgh.

PLAN
of ESTABLISHMENT at
HYNISH, ISLAND OF TYREE.
SHEWING THE
PIER, DOCK, RESERVOIR, LIGHTKEEPERS AND SEAMENS HOUSES &c.

NOTE

The Soundings are marked in a fractional form thus ³²⁄₂₀ in which the figures in the place of the Numerator indicate the depth at high water of spring tides and those in the place of the Denominator the depth at low water of spring tides, the rise of tide being 12 feet.

Stevensons account of the Skerryvore Light House

PLATE XI.

Stevenson’s Account of Skerryvore Lighthouse.

Walter Ferrier, Del^t. William Miller, Sculp^t.

HYNISH DOCK.

Elevation.

Section across Gates.

SINGLE BOOM

PLATE XII

J. L. Kerr, del^t. Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

ANNULAR LENS OF FIRST ORDER
SCALE 1¹⁄₈^th.. FULL SIZE

PLAN

SECTION THROUGH A.B.

TABLE OF ELEMENTS OF LENS
IN MILLIMÈTRES

N^o	RADIUS OF PERIPHERY	RADIUS OF CURVATURE	CO-ORDINATES TO CENTRES OF CURVATURE
N^o	RADIUS OF PERIPHERY	RADIUS OF CURVATURE	x	y
1	140.00	483.50	454.79	00.00
2	208.15	543.60	488.55	13.08
3	262.40	598.62	513.38	31.72
4	309.20	659.77	540.71	57.00
5	350.50	719.84	565.27	84.86
6	387.44	779.48	588.00	114.93
7	422.23	846.45	614.35	151.50
8	456.23	911.30	636.90	189.55
9	490.00	980.30	660.11	250.17
10	523.33	1057.70	683.41	280.60
11	553.33	1136.01	712.79	328.00

PLATE XIII

G. H. Slight Del^t. Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

REVOLVING
DIOPTRIC APPARATUS
FIRST ORDER.
ONE TWENTIETH OF FULL SIZE.

PLATE XIV.

Stevenson’s Account of Skerryvore Lighthouse.

G. Aikman, Sculp^t.

REVOLVING DIOPTRIC LIGHT OF THE FIRST ORDER.

Plan

PLATE XV.

Stevenson’s Account of Skerryvore Lighthouse.

G. Aikman, Sculp^t.

FIXED DIOPTRIC LIGHT OF THE FIRST ORDER.

Vertical Section.

PLATE. XVI.

Stevenson’s Account of Skerryvore Lighthouse.

J. Andrews Del^t. W. H. Lizars Sculp^t.

1^st.
ORDER of LIGHTS.

CONCAVE MIRRORS.

Stevenson’s Account of Skerryvore Lighthouse.

FIXED
CATADIOPTRIC LIGHT
OF 1^st. ORDER
ONE NINETEENTH OF FULL SIZE

PLATE XVII.

REFERENCES.

A B C. CATADIOPTRIC ZONES.
D E F. COMPOUND DIOPTRIC BELT WITH DIAGONAL JOINTS C N M.
A′ B′ C′. LOWER CATADIOPTRIC ZONES ONE DIVISION BEING LEFT OUT FOR FREE ACCESS TO THE LAMP.
F. FOCUS WITH FLAME OF LAMP.

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, Del^t. William Miller, Sc.

PLATE XVIII.

Stevenson’s Account of Skerryvore Lighthouse.

G. H. Slight Del^t. W. H. Lizars Sculp^t.

1^st.
ORDER of LIGHTS.

FIXED
CATADIOPTRIC
APPARATUS.

PLATE XIX.

Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

CATADIOPTRIC APPARATUS.

FOURTH ORDER

PLATE XX

Walter H. Ferrier, del^t. Engraved by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

MECHANICAL LAMP
for
DIOPTRIC LIGHTS
of
FIRST ORDER.

A WICK HOLDERS
B GLASS HOLDER
C SCREW TO RACK D FOR RAISING WICK
D RACK FOR D^o.
E PIPE SUPPLYING OIL TO WICKS
F COLLAR SUPPORTING BURNERS
G DRIP CUP
H RETURN PIPE FOR OIL OVERFLOWING BURNER
I VALVE BOX
J CRANK RODS FOR WORKING LEATHER VALVES
K HINGE OF LID
L LID OF CISTERN
M OIL CISTERN
N SUCTION PIPE
O WINDING ARBOUR FOR MACHINE
P BOX FOR MACHINERY
Q SCREW FOR ADJUSTING LEVEL OF BURNER
R SERVICE TABLE
S COUPLING SCREW FOR OIL TUBE
T UNIVERSAL JOINTS FOR CONNECTING ROD
U CRANE FOR EMPTYING CISTERN
V CONNECTING ROD FOR CRANKS

PLATE XXI

Walter H. Ferrier, del^t. Engraved by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

MECHANICAL LAMP.
ENLARGED VIEWS
OF OIL PUMPS.

ELEVATION

J SUPPORTS OF BURNER
P CRANK RODS FOR LEATHER VALVES
M N SUPPORTS FOR CRANK RODS
L COUPLING
T UNIVERSAL JOINT

P CONNECTING ROD FOR CRANKS
S SUCTION PIPE
O SQUARE TRAY FOR OVERFLOWING OIL
Q LID OF OIL CISTERN
I OIL TUBE

PLANS AND SECTIONS IN REFERENCE TO OPPOSITE PLATE.

SECTION ON LINE A. B.

SECTION OF DISCHARGING CHEST E.

PLAN OF VALVES AT F. F. AND H. H.

PLAN AND SECTION OF PLATE K.

PLAN OF UPPER SIDE OF PUMP CHAMBER AT F. F.

SECTION ON LINE C. D.

PLAN OF LOWER SIDE OF PUMP CHAMBER AT H. H.

PLATE XXII

Walter H. Ferrier, del^t. Engraved by W. & A. K. Johnston, Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

MECHANICAL LAMP
ENLARGED VIEWS
OF OIL PUMPS.

ELEVATION

FRONT VIEW OF LEATHER PISTONS AND LEVERS WORKING INTO PUMP

J SUPPORTS OF BURNER
P CRANK RODS FOR LEATHER VALVES
M N SUPPORTS FOR CRANK RODS
L COUPLING
T UNIVERSAL JOINT

R CONNECTING ROD FOR CRANKS
S SUCTION PIPE
O SQUARE TRAY FOR OVERFLOWING OIL
Q LID OF OIL CISTERN
I OIL TUBE

PLAN

PLATE XXIII

Walter H. Ferrier Del^t. Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

CLOCKWORK MOVEMENT OF MECHANICAL LAMP

PLAN OF CLOCKWORK

SIDE VIEW OF CLOCKWORK

PLATE XXIV

James Andrews, del^t. Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

CLOCKWORK MOVEMENT AND BURNER OF MECHANICAL LAMP

SECTION OF BURNERS

ELEVATION OF WICKHOLDER
ELEVATION OF INNER TUBE OF GLASS GALLERY

PLAN OF BURNERS

PLAN OF THE LOWER SIDE OF BURNERS SHEWING THE HANDLES OF THE RACKS FOR ELEVATING THE WICKS

A. UNIVERSAL JOINT OF PUMP ROD
B. REGULATOR
C. CHAIN BARREL
D. CHAIN
E. DRIVING WHEEL
F. BEVEL WHEELS FOR HORIZONTAL MOTION
G. WHEEL WITH COGS FOR LIFTING BELL-HAMMER
H. HAMMER FOR STRIKING ALARUM BELL
I. ALARUM BELL WHICH REPEATS WHILE THE PUMP IS WORKING
K. ENDLESS SCREW ON AXIS OF REGULATOR
L. WINDING ARBOUR

END VIEW OF CLOCKWORK

PLATE XXV.

Stevenson’s Account of Skerryvore Lighthouse.

G. Aikman, Sculp^t.

FLAME
FOR 1^st. ORDER OF
DIOPTRIC LIGHTS
at full size.

GLASS CHIMNEY

PLANE OF FOCUS

GLASS HOLDER

PLATE XXVI

James Andrews Del^t. Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

LANTERN
1^ST. ORDER OF LIGHTS.

PARAPET WALL

ENLARGED SECTION OF CORNICE

ELEVATION & SIDE VIEW OF UPPER PARTS OF ASTRAGALS

ELEVATION & PLAN OF HORIZONTAL PARTS OF ASTRAGALS

ELEVATION & SIDE VIEW OF LOWER PARTS OF ASTRAGALS

ENLARGED SECTIONS OF ASTRAGALS

ENLARGED SECTION OF SOLE PLATE & ASTRAGAL

PLATE XXVII.

Stevenson’s Account of Skerryvore Lighthouse.

James Andrews, Del^t. William Miller, Sculp^t.

ARDNAMURCHAN LIGHTHOUSE.

PLATE XXVIII.

Stevenson’s Account of Skerryvore Lighthouse.

H. G. Slight del^t. G. Aikman Sculp^t.

ARDNAMURCHAN LIGHTHOUSE.

PLAN

PLATE XXIX

James Andrews Del^t. Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

DIMENSIONS

	F^t.In.
Length between the perpendiculars	80·0
Breadth moulded	20·6
D^o. extreme	21·0
Depth in hold	10·8

Burthen in Tons 158⁹⁄₉₄

FLOATING LIGHT VESSEL
Reduced from Drawings in possession of Honb^le. Corporation of Trinity House Deptford Strond.

MIDSHIP SECTION

PLATE XXX

G. H. Slight Del^t. Engraved by W. & A. K. Johnston Edin^r.

ELEVATION OF COVESEA SKERRIES BEACON.

N. B. The Letters refer to those in Plate XXXI.

Stevenson’s Account of Skerryvore Lighthouse.

PLATE XXXI

G. H. Slight. Del^t. Engraved by W. & A. K. Johnston Edin^r.

COVESEA SKERRIES BEACON

Plan on c d

Plan on a b

Section showing connection of cage with main Pillars

Plan on e f

Section showing connection of Pillars

Section showing attachment of Pillars
to the Sole plates and its connection with Rocks by Bats

Connecting Plate

Plan on g h

Stevenson’s Account of Skerryvore Lighthouse.

PLATE XXXII

James Andrews Del^t. Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse

STONE BEACON

ELEVATION

PLAN OF COURSE AT E E

SECTION

IRON BEACON

ELEVATION

PLAN OF BOTTOM PLATES

SECTION

PLATE XXXIII

James Andrews Del^t. Eng^d. by W. & A. K. Johnston Edin^r.

Stevenson’s Account of Skerryvore Lighthouse.

BUOYS

MAST BUOY

CAN BUOY

NUN BUOY
FOR WRECKS

CASK BUOY

SPHERICAL BUOY

NELSON BUOY
RIVER RIBBLE

FAIRWAY BUOY
RIVER TAY

Transcriber’s Notes

Inconsistent, archaic spelling, hyphenation, typography etc. have been retained, also in proper and geographic names and in numbering of illustrations and plates, except as listed under Changes below. Depending on the hard- and software used and their settings not all elements may display as intended, and zooming and horizontal and/or vertical scrolling may be necessary to view the larger elements.

The book regularly refers to a book published by the author’s father: An Account of the Bell Rock Light-House by Robert Stevenson, which is available at Project Gutenberg: https://www.gutenberg.org/ebooks/48414.

Text in a dashed box underneath an illustration is text that does not occur as such in the source document, but that has been transcribed from inside the illustration for the sake of clarity.

Page xi: the errata have already been corrected in the text; see also under Changes made below.

Page 149, ... the same mass of Mull stone would weigh 4252 tons ...: possibly an error for 4152 tons (which would make the calculation correct).

Page 174: ... somewhat on the same plan as that which is described in the Appendix ...: it is not clear to which Appendix this refers; possibly the reference is to Plate XXXI.

Page 252 ff.: Figures 59 and 60 are identical.

Page 271 ff.: Figures 71 and 72 are identical.

Page 276, See fig. 73 and the following paragraph: the description appears to refer to Fig. 71/72 rather than to fig. 73.

Page 362, Conversely, n′ is the origin of the co-ordinates for the grinding centre O of the interior convex refracting surface BC, ...: in the illustration (Fig. 110) this appears to be a lower case o.

Page 389, entries for May 14 and 15, 1844: the order as given here is the one printed in the source document; the reason for the inverse order is not clear.

Page 422, item Charities &c, number 2: Since last Act: there appears to be a discrepancy between the individual amounts paid out and the sub-total given.

Changes made:

Footnotes, illustrations and tables have been moved outside text paragraphs; marginalia have been moved to where they appeared to fit best in the paragraph concerned. In certain tables, Do. or do. have been replaced with the dittoed text.

Some obvious minor typographical and punctuation errors have been corrected silently. Some minor oddities in text lay-out have been changed silently for easier readability.

Repeated table and column headers, carry/brought forward, subtotals etc. on page transitions in lists and tables have been removed, except partly on the transition from page 423 to 424.

Suter and Souter have been standardised to Suter.

Page xi: the errata listed have already been corrected in the text. The amount L.93,306 : 8 : 10 does not occur on line 6 of page 178; the amount L.90,268, 12 : 1 that does occur on line 7 of that page has been replaced by L.86,977 : 17 : 7 as given in the Appendix (page 384).

Page 61, Footnote The last column of this table ...: ... will be G·MG·M′, by which expression ... changed to ... will be G·MG′·M′, by which expression ....

Page 231: In these figures, n n shews the reflector flame ... changed to In these figures, n n shews the reflector frame ....

Page 267: François Soliel, whom I urged ... changed to François Soleil, whom I urged ...; ... the light derived from the accessary part ... changed to ... the light derived from the accessory part ....

Page 281: OA = ρ . cos . OAX. changed to OA = ρ . cos OAX.

Page 284: F is the small flame in the focus ... changed to E is the small flame in the focus ....

Page 413, entry The Commission paid to Collectors ...: £2401 : 7 : 0⁴⁄₈ changed to £2401 : 7 : 3⁴⁄₈ cf. page 429.

Page 430, entry 9. Startpoint, Balance: 462 0 8⁶⁄₈ changed to 462 0 3⁶⁄₈.

Page 355: ... forming a flat parallelopepid ... changed to ... forming a flat parallelopiped ....

Page 399, entry Drum Sand West Buoy, South Point: Bear changed to Bearing.

Account of the Skerryvore lighthouse

About This Book

Transcriber’s Notes