LIST OF ILLUSTRATIONS

PLATES
[I].	Derrick staging	Frontispiece
[II].	External chimney scaffold	Facing p.33
[III].	Knots	79
[IV].	Knots	81
[V].	Knots	85
[VI].	Knots	87
ILLUSTRATIONS IN TEXT
FIG.		PAGE
[1].	Elevation of staging for derrick crane	4
[2].	Plan of king leg	6
[3].	Showing shoring to central standard	6
[4].	Plan of derrick platform partially covered	7
[5].	Showing method of fixing ladders	8
[6].	Showing derrick staging mounted on travelling bogie	10
[7].	Elevation of square derrick staging	11
[8] and [8A].	Elevation of gantry for traveller	13
[9].	Footing blocks for struts	15
[10].	Elevation of travelling gantry	15
[11].	Gantry or elevated platform over footpaths	17
[12].	Example of stagings	18
[13].	Elevation of pole scaffold	20
[14].	Method of fixing rising standard	21
[15].	Method of connecting ledgers	22
[16].	Method of connecting ledgers	22
[17].	Method of connecting ledgers	23
[18].	Method of connecting ledgers	23
[19].	Method of supporting putlogs where windows occur	24
[20].	Method of supporting putlogs where windows occur	24
[21].	Shores and ties for dependent scaffolds	25
[22].	Methods of laying boards	26
[23].	Methods of laying boards	26
[24].	Masons’ scaffold: end elevation	27
[25].	Landing stages	28
[26].	Needle scaffold	31
[27].	Internal chimney	33
[28].	Method of climbing chimneys, steeples, &c.	35
[29].	Method of climbing chimneys, steeples, &c.	36
[30].	Brackets for climbing chimneys, steeples, &c.	37
[31].	Methods of slinging painters’ boats on chimneys, &c.	38
[32].	Chimney scaffolds for repairs, &c.	39
[33].	Details of chimney scaffolds for repairs, &c.	39
[34].	Details of chimney scaffolds for repairs, &c.	40
[35].	Details of chimney scaffolds for repairs, &c.	40
[36].	Details of chimney scaffolds for repairs, &c.	41
[37].	Method of supporting standards within high towers	41
[38].	Scaffold designed for repairing roofs or archeswhere roadway has to be kept open	42
[39].	Painters’ boats or cradles	43
[40].	Method of slinging cradle to move horizontally	44
[41].	Improved painter’s boat	44
[42].	Boatswain’s boat	45
[43].	Elevation of ladder scaffolding	46
[44].	Details of ladder scaffolding	47
[45].	Details of ladder scaffolding	47
[46].	Details of ladder scaffolding	47
[47].	Examples of flying shores	51
[48].	Examples of single raking shore	52
[49].	Examples of system of raking shores	53
[50].	Details of raking shores	54
[51].	Details of raking shores	55
[52].	Details of raking shores	56
[53].	Example of underpinning	59
[54].	Example of window strutting	60
[55].	Example of cup shakes in timber	63
[56].	Example of radial shakes in timber	63
[57].	Method of cutting stiffest beam from log	66
[58].	Method of cutting strongest beam from log	66
[59].	Method of cutting planks from log	67
[60].	Method of stacking timber for seasoning	68
[61].	Examples of weather shakes in balks	68
[62].	Method of strapping ends of boards	74
[63].	Details of ladder construction	91
[64].	Details of ladder construction	91
[65].	Example of painters’ trestles	92
[66].	Example of cripples	93
[67].	Example of cripples	93
[68].	Example of tipping pail	94
69.	Details of improved safety baskets	95
[70].	Details of improved safety baskets	95
[71].	Details of improved safety baskets	96
[72].	Details of improved safety baskets	96
[73].	Details of improved safety baskets	96
[74].	Example of navvy’s barrow	98
[75].	Example of stone bogie	98
[76].	Example of hand barrows	98
[77].	Example of labourer’s hod	98
[78].	Example of timber trucks	98
[79].	Example of sack trucks	98
[80].	Example of brick crates	99
[81].	Example of ashlar shears	100
[82].	Example of ashlar shears	100
[83].	Example of stone clips	101
[84].	Method of slinging stone	101
[85].	Method of slinging stone	101
[86].	Method of hoisting by means of the lewis	102
[87].	Method of hoisting by means of the lewis	102
[88].	Method of hoisting by means of the lewis	102
[89].	Method of hoisting by means of the lewis	102
[90].	Example of the stone cramp	103
[91].	Wire rope lashing	104
[92].	Chain and bracket lashing	105
[93].	Coupling links	105
[94].	Rollers	106
[95].	Levers	106
[96].	Dog irons	107
[97].	Methods of fixing dog irons	107
[98].	Methods of fixing dog irons	107
[99].	Methods of fixing dog irons	107
[100].	Iron bolts	108
[101].	Iron straps	109
[102].	Slaters’ truss	112
[103].	Duck runs	112
[104].	Scaffolder’s hatchet	113
[105].	Manual building crane	117
[106].	Example of pulley wheel	118
[107].	Example of groove for pulley wheel	119
[108].	Example of groove for pulley wheel	119
[109].	Example of groove for pulley wheel	119
[110].	Example of groove for pulley wheel	119
[111].	Example of groove for pulley wheel	119
[112].	Example of sprocket wheel	119
[113].	Example of single movable pulley	120
[114].	Example of blocks and tackle	120
[115] and [116].	Example of differential pulley	122
[117].	The winch	124
[118].	The winch in use with a double rope	125
[119].	Example of a jib	125
[120].	Example of a jib for fixing purposes	126
[121].	Example of a mason’s jib	127
[122].	Example of shear legs	127
[123].	Example of shear legs to carry jib	128
[124].	Example of movable shear legs	128
[125].	Example of a gin	129
[126].	Method of slinging girders	129
[127].	Diagram showing method of finding the centre ofgravity of a rectangular body	136
[128].	Diagram showing method of finding the centre ofgravity between two combined weights	137
[129].	Diagram showing method of finding the centre ofgravity between three or more combined bodies	138
[130].	Method of finding the centre of gravity of arectangular surface	139
[131].	Method of finding the centre of gravity of atriangular surface	141
[132].	Diagram showing the method of calculating the breaking weights of beams	147
[133].	Diagram showing the method of calculating thebreaking weights of beams	147
[134].	Diagram showing the method of calculating thebreaking weights of beams	148
[135].	Diagram showing the method of calculating thebreaking weights of beams	148
[136].	Diagram showing the method of calculating thebreaking weights of beams	148
[137].	Diagram showing the method of calculating thebreaking weights of beams	148
[138].	Diagram suggestion for preventing accidentson short ladders	154
[139].	Method of staying ladder to prevent sagging	155
[140].	Method of staying ladder to prevent sagging	155
[141].	Illustrating dangerously laid boards	156
[142].	Illustrating the danger of a trap	156
[143].	Illustrating method of supporting centering	157
[144].	Illustrating method of supporting centering	158
[145].	Fan guards	158
[146].	Illustrating cause of fatal accident	159