The republic. [volume] (Washington [D.C.]) 1849-1853, 1851-07-30

~ office, until IL O'Clock on the 9th day OF Au-
| gust, for furnishing materials and construclng a
LIGHTHOUSE, TO be erected on Blackstone 8
Island. on the Potomac river, in conformity with
plan which can be seen at this Office and the
nexed specifications, with the addition of second
story OF nine feet in the clear, with fireplace,
chimney, and fue, as described in specifications,
and to re finished in all respects as first story ex.
ceptng that OF substituting window for door.
Specifications for Lighthouse and Keepers
DUelLing. ccnjOiEt, 10 be erected at Black
istoRe'S Island, on the Potomac rioer.
The building is to be thirty eight by twenty feet
on 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 s a cellar six feet deep in the
clear under the flooring joist of entrance story
The cellar exterior walls and the exterior walls
OF the building to he 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 il, and bulk
head over II to protect 1t against storms, &c.
lhere VIII be two windows, OF ak lights each by
III 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 timbers 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 a fire.
place, the other a hearth and fue, with proper
funnel pipe for cooking stove in the entrance
story; one fireplace in one attic chamber, and
funnel pipe for a stove in the other
The entrance story ia divided into two rooms,
with an entrance vestbule, stairway, &c, of eight
feet between them The stairs lead from the en-
trance vestibule 10 the attic and lantern; and un-
der them are the stairs leading from the kitchen TO
the cellar. The space back Of the stairway is di-
vided into two closets, one opening to each room,
and to be finished with shelves and other necessary
convenences. The attic ia divided into two cham
Wi bet
In front OF the stairway is closet opening into it,
and in rear two recesses, one opening into each
chamber.
All the joiss TO be of southern pine of good quail
ity. The lower flooring joists to be 3 by s
inches, 10 inches apart, and doubled trimmers,
and as trimming joist at the sides Of the hearths
and other openings, the joists 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 raiters is TO be truss Oft by inches timber,
Of sufficient depth and strength to support the roof
The roof Is to be rectangular, and have one third
pitch; the rafters are to be by inches, feet
apart, resting on the plates and ridge, covered
with good seasoned inch boards, milled, jointed,
and matched, and well nailed on. 1t is to be Gov
cred with the best quality of Ladies' sates laid
ne-third OF an inch less than third their length
TO the weather, nailed and secured 10 the board
ing by the best copper composition nails for the
purpose In the centre of the building is TO be a
circular tower, feet in diameter the nside
built on proper foundation, % inches wide and 2
feet deep below cellar floor, and up to feet above
the ridge of the house, and there receive a
stone coping of one foot rise and and ten inches
projection, of proper width. Its walls to
be connected with the outer walls by brick par
ttion wall inches thick. In the walls viii 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
to 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 scuttle to enter the lam
term The arch is to be domcal arch of twenty
inches RISE its thrust to be fully counteracted by an
iron bar hoop II inches square, let into the brick
work at proper height. The arch is to be
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 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
occurred to ii; this boarding to be covered with
sheathing paper, thoroughly saturated with and
laid down in far. 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 sheathipg,
and made tight and secure.
The tower and chmneys will be collared with
lead, and properly secured with lead zinc flash
ings. There will be three windows in each room
of the entrance story, and in each of the cham
beers, IL lights each, Of by IL cylinder gfass. The
feet inches d inch thick, four panels and two
frieze lights; the outside door of porch feet
inches by feet inch thick four panels In the
entrance story are inside doors, feet inches by
feet inch thick, four panels. In the attic story
doors, feet by feet inches, 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,
atches, bolts, and fastenings.
The stairway and cross walls above the cellar are
to be plastered on the walls; all the rest of the
building above the cellar, together with the porch.
is to be furred, lathed and pIasered, 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
to be constructed from the entrance to the
lantern, and from the kitchen to the cellar, in
proper manner. Steps / J inch thick. There
to be stone steps to the front door, also to the out
side door of porch.
Attached to the back of the house is q frame
porch, IL by 10 feet, with lean to roof, boarded
and slated. The floor is inches below floor of en-
trance story, and the room feet high. There is to
be one window, II lights, by 10 glass. 1t s to
have proper sink, shelves, &c. There to be
cutters to all the caves with trunks to lead the
ter into the cisterns. All the woodwork of the
house, except the hoors to be painted, three coats
best quality OF paint stairs oiled with liuseed oil.
On the top of the tower is to be wrought iron
lantern, sufficient in height and diameter to con-
tain six lights in each octagon l6 by "a inches, and
two copper panes IL by 10 inches. In four of the
admit the air when required, and to keep out the
water. There are to be lantern ports i inch
square to run down through the deck and arch,
and be tightly secured by bolts 10 the inside of
the tower. To these secured, in proper man
ner the iron sash with rebates of three fourths Of
an inch in depth. door, two by feet, is to be
made on one side of the octagon, and which ia to
be glazed and partly covered with copper, If re-
quired, and made 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 an iron hoop II inches diane
ter, inches wide, and one half inch thick the
top, and at the bottom secured to top rail. OF Ian
term which scovered with 81 ounce copper, coming
down and rivetiug to the top rail of lantern the
sashes, which is inches wide, and forms a favora
bic termination to it. On the top of this dome is
traversing ventilator and vane, covered with cop
per; ventilator Is inches diameter, 30 inches hgh
vane 30 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
mel iron IN ite theae