3-26 



THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 



[September, 



The east end, as may be seen, presents a series of circular-headed 

 windows on a lofty stylobate ; and is surmounted by a bold cornice and 

 balustrade. The material of this end of the edifice is of stone ; the 

 other walls, with the tower, &c. are of brick. 



A plain room, of most uneven shape, about GO feet long and 33 feet 

 broad within the walls, with a plain flat ceiling, slight'y coved at the 

 sides, forms the church. 



A gallery at the west end contains a small organ; the altar-piece at 

 the east end displays some good specimens of carving. This latter, 

 together with the table and rails, was the gift of James Smyth, Esq. 

 in 1G85 ; at which time, the church was rebuilt by Sir Christopher 

 Wren. 



ST. MARY MAGD.4.LEN'S. 



The church built by Wren is a substantial fabric, with a bell- 

 tower ut the north-west corner; the latter, however, as well as 

 the north side and west end of the church, is shrouded by houses. 

 The south side and east end of the edifice, display a series of 

 circular-headed windows, at a considerable height from the ground, 

 with trusses at the sides of each of them, sui)portiiig a continued 

 cornice above. A stone balustrade of meait and insignificant cha- 

 rater, terminates the design. 



attempted to be show n, has boards in front, three feet long by six inches 

 in breadth, and three and a half to four inches in thickness (known by 

 the technical name of poling boards"), supported and kept in position 

 by means of screws, which are lodged against the front iron frame ; 

 these boards, to the number of forty-four in each frame, are in succes- 

 sion taken down while the earth in front of each is excavated, the first 

 board being always replaced before a second is removed, and thus 

 forming a constant firm buttress. The several parts will be better un- 

 derstood by reference to the following numbers : — 



1. Poling boards. 



2" Poling screws. 



3. The " top staves" covering the upper part of the excavation till 

 the shield is succeeded by brick-work. 



4. Screws to raise or depress the top staves. 



5. " The legs," being jackscrews fixed by ball joints to the shoes G, 

 upon which the whole frame stands. 



7 and 8. The sockets, where the top and bottom abutting screws are 

 fixed to force the division or frames forward. 



The design and organisation of this machine cannot be too much 

 admire 1, and we only regret our inability to do it full justice. 



The tower has a bold cornice around the upper part of it, and is 

 surmomited by five steps, forming a pyramid which supports a small 

 stone belfry : the whole plain and simple, and productive of a better 

 effect in the original than in a drawing. 



Withinside uie church, the ceiling is flat, fexcepting immediately 

 against the four sides, where it is coved,) and has a modillion cornici' 

 ■..round it, and a large flower within a circular panel, in the centre. 

 There are groined openings in the coved part of the ceiling, to admil 

 the semicircular heads of the windows which light the church. 

 Against the north wall is a gallery of oak, supported on iron columns ; 

 and at the we.>t end is a similar gallery containing an organ which was 

 erected by subscription in 17S-i. The pulpit, a good piece of work- 

 manship, is aflixed to the south wall. 



THE THAMES TUNNEL SHIELD. 



We are indebted to our highly respected contemporary, "The 

 Mining Journal" for the following engraving and description of the 

 Shiekl used in the construction of the Thames Tunnel, by Mr. Brunei. 



The shield consists of twelve great frames, which, being indepen- 

 dent of each other, may be advanced separately, by me;ms which will 

 be better understood on referring to the plate ; each division, as is 





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