INDEX.

Page

Cocking or cogging - 1304Cocks, stop and metal 167■ — , fourway - - 1260

- , sluice - - 1214

Cofferdams 269. 430. 446.

465. 468. 1518, 1519.Cogs - 1566

Cohesive strength - 1293Colechurch, Peter - 412

Coliseum - 93. 96

Colossus - - - 48

-of Claudius - 133

Colours used by the

Romans - - 103

Column of Antoninus 198

-of Trajan - 198

Comitium - - 85

Compressibility - 917

Conches or locks - 186

Conchifera - - 621

Concrete 25. 309. 724Conduit pipes of clay 94.

172. 1139.

-, of metal - - 1226

-, for heating - 127

Cones - - - 758

--, to construct - 781

.., to find their su-perficies - 877

-, their solidity - 877

Conic sections - - 782

Conisterium, apart-ment - - - 122

Conoid, parabolic - 890

Contectis Piscinis - 169

Continuous rectilinear

motion changed 954, 955Contour lines on maps 802Contract for London

Bridge - - 455

Convex mirrors - 244

Copper - 670

Copying plans - - 870

Coral rag - - 628

Corlina 99

Cornbrach limestone 628Coryceum, apartment 122Copper - - 51. 670

-, adit of mine - 675

-, alloys of - 671

-, crushing-mills

for - - 676

-, oxides of - 670

-, riddling of - 677

- sampling of - 678

-, sulphates of - 670

Corneil wood - - 101

Corvus or raven - 1006

Cos, Island of - 54

Cosa, walls at - - 77

Cotton spinning - 976

Couplet on centres - 1408Couplings - - 949

-, friction - - 950

Crab for raisingweights - - 1001

Page

Cradle for hoisting - 239

Cramping of stone - 379

Cramps, dowel and

dovetail - - 1441

Cranes 1004. 1006. 1011

-, movable - - 1008

-, Perronet’s - 1009

Crank - 1267,1268

Crapone, Adam - 245

Crayon, Port - 868, 869

Cretaceous system - 626

Cross staff for measur-ing - 870

-, applied to angles 871

-, polygons - 873

-, rhomboids - 872

Ctenoidans - - 621

Ctesibius’s pump - 204

Ctesiphon ’s method ofraising weights 75. 201Current, to find thevelocity of - 636. 1139Cutting knife for

weeds - - - 191

Cyclops - - - 67

Cylinders 751. 781. 877.

955. 1275.

-, strength of metal 1258

Cypress, wood of, 108. 1285

Drodalus - 80

Daily labour of men 1087Dams, double - - 128

Danaide - - 959

Darius’s Bridge overHellespont 67

Degrees - - 748. 811

Demetrius, Poliorcetes 44Denudation - - 623

Derrick cranes 1012, 1013Desarque’s pump - 1194Devonport column - 1012Dilatability - - 915

Dimchurch wall - 1558

Dinocrates - - 32

Divisibility - - 916

Delorme, Philibert - 1377Delos, Isle of - - 69

Diaclos, or drawingplan 44

Diades 75

Diagonal lines - 736Diallage, or serpentine 635Diameters of circles - 874

Diatonous - - 1423

Diognetus - - 46

Dioptera - - 166

Diverticulum road - 149

Diving bells 1050, 1051Docks at Antwerp - 214

___ Commercial - 310

-, Catherine’s, St. 308

_, Chatham - 318

--Cumberland - 363

.-Deptford - 314

-- Goole - - 324

1643

Pajre

Docks, Hull - 325. 327

-, India , East

312

-, India , West

313

-, London -

310

-, Ramsgate »

396

-, Sheerness

318

-, how cleansed -

329

Dock-gates at Mon-

trose

1553

-at Wool-

wich

1554

Dodecaedron - 755.

779.

889

Dolabella, arch of

97

Dolamite

702

Domenico’s invention

of locks

187

Domes -

1345

-, Assumption at

Paris -

1346

—, Invalides at

Paris -

1348

-, St. Mark at

Venice

1361

--, Salutation

Church

1347

-, spherical

1459

-, Val de Grace •

1345

Domitian , villa of

93

Dorians -

158

Doric temples -

1580

Doron -

708

Dovetailing stone

379

Downs or dunes

642

Dragging

1520

-for mud -

1057

Drainage - 188.

1562

-, Belgium pro-vinces - - 214

-, Pens - - 541

- -, Hontsdam - 214

-, Nene outfall - 539

-, Pontine Marshes 188

- . , Purmer Lake - 213

-, Romney Marshes 532

-, of towns - 543

-, Witham Marshes 537

Drain pipes - - 468

Draining and embank-ing - - - 1557

Drains in the amphi-theatres - 112, 113

Drawing circles and

ovals - - 773

-parabolas - 773

-polygons - 773

-piles - - 1078

Drawbridges - - 1392

Dredging machines 329.

1057

—, bucket machines 347.

1058

-, value of work - 897

Drilling machines - 1030

- > hand and foot

machines - 1031