125 



Hand-hole in column forms, 

 13 In wall centering, 27. 



Hand mixing, frame for, 53 

 Mixing, 52. 



Handling material, 49. 



Hoist, field-made, 54. 



Hoisting tower, 53. 



Hopper, field-made, 51. 



Horizontal boards in wall cen- 

 tering, (table) 29. 



Horsepower, 63. 



Hot bending, 35 T w i s t e d 

 steel, 7 Weather, 59, 85. 



Machinery, shipping tools and, 



64. 



Magnesia in cement, 4. 

 Marking centering for steel, 



39. 



Materials, weight of, 74. 

 Measurements, wheelbarrow, 50. 

 Measuring pole, 68. 

 Metal rests, 39. 

 Methods recommended by the 



Am. Soc. Testing Materials, 



110. 

 Mixing, 84 Concrete, 84 



Frame for hand, 53 Plants, 

 48 Plant, layout of large, 



Inches in decimals of a foot, ^ii xe ' rs , 52. 



(table) 100. ; Mixer,' cleaning, 60 Feeding 



Inspectors, authority of, 76. 



Inspection, concrete, 74. 



Inspectors, duties of, 75. 



Insurance, fire, 64 Liability, 



Inventories, 67. 



Iron oxide in cement, 



Weight of cast, 74. 



4 



Tar or shock to new concrete 



25. 

 Joists in floor centering, 19. 



the, 50. 



Mold for concrete saddles, 37. 

 Mortars, fineness of sand on, 

 (table) 101. 



Nails and spikes, 93 'Excessive 



use of, 10. 

 Normal consistency, per cent 



of water in mortars, (table) 



111. 



, field, 59. 



Ladder for removing forms, Oiling forms, 



2?. hearth steel, 6. 



ladders, 68. Openings in floor centering, 21 



Layout of large mixing plant, In floors, 38. 

 43. 



Liability insurance, 68. 



Lime in cement, 3, 4. 



Limestone aggregate, 5, 7 Panel type floor centering, 13. 



Linear measure, table of, 73. Paraffine on forms, 28. 



Loads in posts and braces, 92. Per cent of water in mortar* 



Low water in boiler, 63. of normal consistency (ta- 



Ltrmber measure, (table) 91. 1 ble) 111. 



