430 



THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. 



[NOVEMBKE, 



and only a tew K'Kois iviiiaiii of an insrriptiun which probably con- 

 tainoil tliL" name of the deceiiseiL The next sarcophagus lias no bas- 

 relief of any kind, the cover is a figure of a priestess of Bacchus lying 

 supinelv on the chest ; she is dressed in the pomp of her sacred call- 

 ing, and ornaments of gokl decorate her i)erson. A fawn, sacred to 

 tills god, is lying beside her ; in her right hand is a vase with handles, 

 ami a thyrsus in the left. The style of this figure varies from that of 

 all (ho otliers. 



The next chest is of terra cotta ; the statue which forms the lid of 

 it represents a young female dressed as the old matron before de- 

 scribed, but it is to be remarked of this figure the singular position of 

 the legs; the left is bent under the other, and is seen at the back of 

 the statue ; the whole is coarsely finished, except the face, which is 

 more carefully formed. The adjoining one is also a sarcophagus of 

 terracotta, and has on it two figures of dolphins in relief; the cover 

 is a young woman, whose head is encircled by a garland, reposing 

 witli the right hand under the neck, while the other is extended, on 

 the little finger of which is a ring; the leg is in the same awkward 

 position as the one before iiientioned. 



The last we have to describe is a magnificent tomb, which bears in 

 front two winged genii, sculptured ; in the hand of one is a torch ; 

 the other bears military trappings, and in the centre are ornainenfs of 

 leaves ; at the sides are heads of animals, in various forms, and at the 

 back are other genii and ornaments. The co\ er is of a cubical form, 

 terminating at the cornice with tiles and artificial iflasks, surrounded 

 with festoons ; in the middle of the ridge of Ihe roof are two serpents 

 tied in ii knot. At the extremities are sphynxes with expanded 

 wings. The whole is sculptured in peperino stone, which is carefully 

 covered over with a coating of lime stucco, and coloured in red, black, 

 white, and green; on the front is an inscription, and the same is de- 

 lineated in colours on the lid. 



ST. KATHARINE'S DOCKS. 

 EiVGiNEEK, Thomas Telfohd, C. E. 



SPECmCATION OF ENTRANCE LOCK AND CoiTER DAM. 



The lock which is to be enclosed from Ihe river by a coffer dam during 

 /he execution of the work, is to be placed on the situaUon shewn on the 

 plan, and its dimensions are to be as follows, (there are to be three 

 pairs of gaits.) 



The upper sides of the pointing cills for the lower or river and 

 middle gates are to be 10 feet below low water mark of a spring tide, 

 and the pointing cills for tlie upper gates vire to be laid (> feet below" low 

 water-mark of a spring tide, the level of w hich is to be reckoned from 

 Trinity datum, which tides is calculated to rise IS feet from low to 

 high water ; the coping of the lock is to be G feet (i inches above the 

 level of high water, so that from the cills of the lower or middle gates 

 to the top of the coping the dej)tli will be 3-1 feet inches, and the 

 upper gates 30 feet 6 inches. The length between the lower and 

 upper gates is to be 175 feet; the width of the lock is to be 45 feet 

 at top, the platforms for the gates one foot lower than the tops of the 

 jiointing cills, and inverts for a caisson at each end of the gates are to 

 be on the same level. 



The earth is to be excavated down to the surface of the clay of a 

 suflicient length and breadth to afford space for constructing the lock 

 and its appendages, and for walls for an iron sw ivcl bridge, and also 

 for 5 feet in thickness of puddle at the back of all the walls, and the 

 earth that is excavated to be removed by the contractor to some place 

 to be found by him, excepting such portions as the resident engineer 

 shall direct to be selected and preserved for puddle. All the space 

 between the before mentioned clay and the bottom of the lock, inverts, 

 platforms, chamber walls, counterforts, capstan funnels, bridge walls, 

 and every part of the brickwork and masonry to be carefully filled up 

 with proper puddle or good clay, as shall be directed by the resident 

 engineer. 



The platforms for the gates' recesses and river wings, are to have 

 bearing jdlcs of beech or elm timber, and driven as shewn on the plan 

 to be in lengths of 12 feet, and to average \) inches diameter in the 

 middle, each pile is to be shod with a wrought iron shoe of not less 

 than iU lbs. weight, — they are also to have a wrought iron circular 

 hoop 3 inches broad and 1 inch thick fitted to their heads, to prevent 

 them from splitting while driving. A row of sheeting piles grooved 

 and tongued must be driven under the pointing cills to each platform, 

 the timber for which is to be beech or elm in lengths of 12 feet and 9 

 inches thick, they are to be shod with strong plate-iron shoes, and 

 driven close to each other so as to be impervious to water. Similar 

 rows of sheeting piles are to be driven under each groove for a caisson, 

 and also at the toe of each wing wall at each end of tbe look, the latter 



are to be driven in a slanting direction to corrcsjiund with the batter 

 of the walls as represented in the drawing, and are to be '.) inches 

 thick by about 12 feet in length; the heads are to be cut off straight 

 and at a proper level, and at the top of each row luider the pointing 

 cills and grooves for the caisson a waling of fir timber is to be placed 

 on each side 12 inches broad by G inches thick, these walings are to 

 be secured to the piles by screwed bolts with nuts and plates, the iron 

 for the liolls to be 1 inch diameter, and those for the slanting piles to 

 be li inch, and the distance between each bolt is not to exceed 2 feet, 

 the heads of the bearing piles, under each platform and pier are to be 

 cut ofl' at a level agreeably to the drawing, and u|)on them cills of fir 

 timber 12 inches square are to be placed and securely sjiiked down to 

 the piles with one spike to each bearing pile, the s|)aces between 

 these pile heads, and cills are to be solidly filled and well rammed with 

 good tough clay and gravel, mixed in ;i proportion of .ird gravel to Jrds 

 clay. Fir planking G inches thick laid close is to be spiked down to these 

 cills with one spike in each plank upon each sleeper, the spikes for 

 which are to be 12 inches long, those for the cills to be from 20 to 24 

 inches, of J square iron, the latter to have jagged points ; upon these 

 Hoors of timber are to be constructed the platforms or aprons for the 

 gates, the recess walls, and the piers for the swivel bridge. The 

 ground upon which the inverted arches for the chamber and wings is 

 to be placed must be prepared to a proper form agreeably to the 

 drawing. The idatforins cu- aprons of the gates are to be of Bramley 

 stone in Yorkshire, or Stoiiadge stone in Derbyshire, or Dundee, Mill- 

 field, or Loker stone Scotland (all of the l.est quality, the contractor 

 is to be at liberty to jn'opose any other f[uarries for the consideration 

 of the directors) and laid in regular courses, and radiated so as to 

 form an inverted flat arch on the lower side of the cills ; these stones 

 are to be 3 feet '.t inches in depth from the top of the outer platform, 

 and those innler the sectors for the gates are to be 2 feet 'J inches as 

 shewn by the longitudinal section; these platforms are to extend under 

 the recess walls. The masonry is to be solidly bedded in Pozalano 

 mortar mixed in the following proportions, viz. : two parts Dcu'king 

 or Merstham liine powiler, one part of Pozalana and two parts clean 

 sharp river sand, the lime and Pozalana to be ground together in a dry 

 state. None of the courses are to be less than 15 inches thick on the 

 face, and no stone to be less than 3 feet long, the beds to be correctly 

 dressed to the radius, and the end joints made truly scpiare froui the 

 face, the face of the stone to be neatly droved romid the edges and 

 face with a chisel 2 inches in breadth, and the same on the beds and 

 end joints, and neatly punched between the said chisel drafts. The 

 inverted arch of the lock is to be elliptical, and of brickwork 2 feet 3 

 inches thick at the bottom, and increasing upwards as shewn by the 

 transverse section, with stone quoins at every termination. The bricks 

 to be well burnt, hard sound grey stocks laiil flush in mortar, mixed in 

 the pro|iortions — I part Dorking or ilerstham lime pow-iler, and 2 parts 

 clean sharp river sand. The chamber and recess walls, and also the 

 wing walls are to be of brickwork, built of similar bricks exceiit the 

 facing for 9 inches inwards, w hich is to be of well burnt sound niarhn 

 liaviers, the courses of bricks to be laid at riglit angles from the face 

 of the walls, miless where otherwise shewn in the section, they are all 

 to be laid flush in mortar as above described. Two courses of bond 

 stone 1 foot 3 inches thick on the face is to be built in the chamber 

 walls of the lock, as shewn in the transverse section; the beds to be 

 radiated and laid at right angles from the face of the walls ; the front 

 is to be of the before-mentioned stone, laid header and stretcher alter- 

 nately, the headers not le^■s than 3 feet long on the face, by at least 4 

 feet on the bed, the stretchers not to be less than 44 feet long on the 

 face, by 2^ feet on the bed ; the stones to be well dressed as formerly 

 described, and laid flush in mortar ; these stones to cover the wdiole 

 breadth of the walls and comiterforts. The stones for the counterforts 

 to bond at least 15 inches into the main wall. The hollow^ quoins for 

 the round posts of the gates are to be of the before-mentioned stone. 

 No stone to be less than lb inches thick, or to answer six courses of 

 bricks, and not less than G feet long by 44 feet on the bed, an average 

 from the whole length of each stone, they are to be laid flush ami 

 solidly bedded in Pozalana mortar; the face for the round posts to 

 rest against is to be very correctly and very neatly dressed w itli a 

 chisel, so as to make a water-tight joint betwixt the wood and the 

 stone, the face of the other part to be dressed similar to that of the 

 apron, the beds and end joints are to be truly workeil throughout, so 

 that the masonry maybe perfectly solid and impervious to water. The 

 quoins at the recesses for the gates are to be of stone of a similar 

 (piality to that for the hollow quoins ; no stone to be less than 15 inches 

 thick on the face, and 4 feet long by not less than 2 feet G inches on 

 the bed, ami to be as well dressed as the hollow quoins. 



A groove for the caisson is to be formed across the bottom, and up 

 the side walls at each end of the lock as represented in the draw iug. 

 On the outiside of these grooves, between the wing walls at each es^ 



