BULLETIN 1216. U. S. DEPARTMENT OF AGRICULTURE. 95 
Page. 
Guardrail, wire rope, tests 91 
Impact test, gravel 9 
Joint filler, method of sampling 4." 
Lithological count of gravel particle* 8 
Mechanical analysis : 
Aggregate I te 11 
Bituminous aggregates (traction 
Goarf - gate for bituminous mixes 67 
Fine aggregate for bitumin - 68 
Mineral filler 
Metal culvert, corrugated, test? and inspection 
Method of testing metallic materials M 
Mineral filler : 
Mechanical analysis 69 
Sampling 45 
Organic matter in fine ag_rregate 14 
Paving hrir-k. testing 35 
Penetration, bituminous materials 53 
Pipe, culvert, clay and concrete, tests 78 
Portland cement tests 27 
Preservative oil. test and sampling 71 
Reinforced-concrete pipe tests 
Residue of desired penetration, percentage of 64 
Rope, wire guardrail, tests 91 
Sampling, method of : 
Bituminous material 43 
Bituminous mixtures 
Creosote oil 71 
Gravel 3 
Mineral filler • .-. 
Portland cement 28 
Premoulded joint filler 4.", 
Stone, slag, sand, day, s-migravel 
W. •! block 42 
Sand. See Fine aggregate: 
Shale in gravel 
Sieve analysis. See Mechanical analysis. 
Silt and clay in fine aggregate 1© 
Silt and clay in gravel 9 
Slag, method of sampling 3 
Softenins: point of bituminous material 57 
Solubility in carbon disulphide, bituminous material 47 
Solubility in carbon tetrachloride, bituminous material 49 
Solubility in paraffin naphtha, bituminous material 49 
Soundness test for coarse aggregate _ « 
Bituminous materials 4-" 
Fin^ aggregate 12 
Coarse aggregate 10 
Specific viscosity, bituminous materials 59 
Spelter coating. fiTee Galvanising. 
Stone abrasion test .*- 6 
Stone block, method of sampling 5 
Stone : 
Method of sampling 
Toughness test 7 
Tar. Bee Bituminous materials. 
Tension test for fine aggregate 14 
Testing metallic materials, methods B4 
Tile, drain, tests 7^ 
Toughness test for rock 7 
Transverse test of concrete 
ilization test for bituminous materials 50 
Water in bituminous materials 70 
Water in emulsions, test 
Water for concrete 
Weight of concrete aggregates, test for 13 
Wire rope, tests for 9] 
Wood block, sampling and tests 42 
