The republic. [volume] (Washington [D.C.]) 1849-1853, 1851-07-28

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gust, for furnishing materials and constructing
| LIGHT HOUSE, to be erected on BIackistone's
Island the Potomac river, in conformity with
plan which be seen at this office, and the an
nexed specifications, with the addition OF second
story OF nine feet in the clear, with fireplace,
chimney and fiue, as described in specifications,
and Sc finished in all respects first story ex
cepting that of substituting window for door.
Specifications for Lighthouse and Keepers
D1oelling conjOint, TO be erected at Black
islone's Island, on the Potomac river
The building is to be thirty eight by twenty feet
the outside The exterior walls of the house are
to be constructed of hard brick and the interior
walls and walls OF the tower OF hard brick, all
laid In the best hydraulic cement mortar. Under
the whole house is cellar six feet deep in the
clear, under the flooring joist Of entrance story
floor.
The cellar exterior walls and the exterior walls
of the building to be fourteen inches thick, "a
brick and half) The cellar floor is TO be paved
with best quality hard paving brick. Doorway to
enter cellar from the outside of the building with
steps to go down, stone curb around it, and bulk
head over 1t to protect 1t against storms, &c.
There will be two windows, of six lights each, by
10 glass, in the cellar The walls OF the house are
to be carried up 10 feet above the top of entrance
story floor, when the flooring tinlbers of the attic
flooring will be laid on, then carried up three feet
to the plates where it will receive the rafters.
Chimneys at each end, one of which to have fire.
place, the other hearth and iue, with proper
|
story; one fireplace in one attic chamber, and
funnel pipe for a stove in the other.
The entrance story Is divided into two rooms;
with entrance vestbule, stairway, SC, of eight
feet between them. The stairs lead from the
trance vestbule 10 the attic and lantern; and I'M
der them the stairs leading from the kitchen to
the cellar. The space back Of the stairway is di-
vided into two closets, opening to each room,
and to be finished with shelves and other necessary
conveniences. The attic is divided into two cham
bers, with the tower and stairway between them.
In front OF the stairway 10 closet opening into it,
and in rear two recesses, one opening into each
chamber.
All the josts to be of southern pine of good quail
| ity. The lower flooring joists to be by 8
inches, 10 inches apart, and doubled trimmers,
and as trimming jost the sides of the hearths
and other openings, the ioists of the upper floor
same size, placed 10 inches from centre TO centre.
The ridge OF the roof to receive the upper end OF
the rafters is to be truss of by inches timber,
of sufficient depth and strength to support the roof
The roof ID to be rectangular, and have third
| pitch the rafters are to be 3 by inches, feet
! apart resting on the plates aud ridge, covered
with good seasoned inch boards. milled, jointed,
and matched, and well nailed on. II is to be COW
| cred with the best quality of Ladies' States laid
onethird OF an inch less than third their length
to the weather, nailed and secured to the board
ing by the best copper composition nails for the
| purpose In the centre of the building is to be
circular tower, 8 feet in diameter on the inside,
| built on proper foundation, % inches wide and
feet deep below cellar floor and up to feet above
| the ridge of the house, and there receive
stone coping of one foot rise and and ten inches
| projection, of proper width. Its walls nre to
be connected with the outer walls by brick par
| tition wall 9 inches thick In the walls win be
proper openings for doorways, &c.. and for one
window in front above the roof of lights, by II
inches The openings will have to be secured by
arches turned over them, and extra security given
10 the walls by the insertion OF nail plate in the
joints OF the masonry at proper intervals and places
The upper end of the tower, forming deck for the
lantern to rest upon is to be arched over, leaving
proper size opening for scutte to enter the lam
| tern. The arch is to be domical arch Of twenty
inches rise, it's thrust to fully counteracted by
iron bar hoop inches square, let into the brick
work at a proper height. The arch is to be 3
inches thick at the crown, and the deck is to have
pitch of inches from the centre down to the front
| edged OF the coping or cornice Of the tower The
deck Is to be covered with 20 ounce copper sheath
ing, laid ON proper surface, prepared by covering
| the brick work with boarding inch thick, nailed
to timbers let into the brick work of the tower and
| secured to it; this boarding to be covered with
| sheathing paper, thoroughly saturated with and
laid down in tar. On this the copper sheathing is
to be secured in thorough manner with copper or
composition nails; and also to the front edge of the
stone coping in the most efficient manner. The
scutte door TO be covered with copper sheahng,
and made tight and secure
The tower and chimneys will be collared with
lead, and properly secured with lead zinc fash
| ings. There will be three windows in each room
OF the entrance story and one in each of the cham
bers, u lights EACH of by II cylinder glass. The
outside door in front will be 8 feet inches by 7
feet inches, ] inch thick, four panels and two
frieze lighte the outside door of porch 2 feet 6
inches by Z feet inch thick, four panels. In the
entrance story inside DOORS . feet inches by
Z feet inch thick four panels. In the attic story
doors, feet by feet inches, l., inch thick.
four panels; and one to closet feet inches wide,
and as high as roof will admit. On the front door
will be lock, and on all the doors good hinges,
atchcs, bolts, and fastenings.
The stairway and cross walls above the cellar are
to be pastered on the walls; all the rest of the
thp liar thpr,r the
ID TO be furred, lathed and plastered, and finished
in decent manner All the plastering to be done
with three coats, last coat hard finished All the
floors to be laid double, the upper one of the
best southern pine. Stairs of best southern pine
| are to be constructed from the entrance to the
lantern, and from the kitchen to the cellar, in a
proper manner. Steps / inch thick There are
to be stone steps the front door, also to the out
! side door of porch.
1 Attached to the back of the house is a frame
porch IL by 10 feet, with lean to roof, boarded
and slated The floor is s inches below floor of en-
| trance story, and the room feet high. There is to
| be one window, IL lights, by 10 glass. 1t is to
have proper sink, shelves, &c. There are to be
cutters to all the caves, with trunks to lead the
| ter into the cisterns. All the woodwork of the
house, except the floors, to be painted three coats
best quality of paint; stairs oiled with nseed oil.
On the top of the.tower is to be q wrought iron
lantern, sufficient in height and diameter to con-
tain SIX lights In each octagon 6 by "a inches, and
| two copper panes II by l6 inches. In four of the
| copper panes ventilators to be constructed to
| admit the air when required, and to keep out the
water. There are to be lantern ports Il inch
| square 10 run down through the deck and arch
and be tightly secured by bolts to the inside Of
the tower. To these are secured, in proper man
ner, the iron cash with rebates Of three ourths of
an inch in depth. door, two by feet, is to be
made on one eide of the octagon, and which is to
be glazed and partly covered with copper, if re-
qured and made to shut tight into rebates, having
two strong turn buttons and handle. The top OF
the lantern is dome formed by 10 rafters of iron,
concentrating into iron hoop IL inches dame
ter, inches wide, and one halt inch thick at the
| top and at the bottom secured to top rail of lam
tern, which iscovered with 80 ounce copper coming
down and riveting TO the top rail of lantern the
sashes, which is inches wide, and forms favora
bic termination to it. On the top of this dome is q
traversing ventilator and vane, covered with cop
per; ventlator is inches diameter, 20 inches high
| vane 80 inches long, IL inches wide. Around the
lantern are to be eight iron railing posts, square,
standing of % inches from the outside OF the post
| of the lantern. The lower end to be fastened Sc
curely TO the deck, and at the top secured to the
| post Of the lantern. Two ratings three fourth
inch round iron, are TO go quite round these posts
Across the base of the dome Is be an iron bar one