98 BULLETIN 949, U. S. DEPARTMENT OF AGRICULTURE. 
TENTATIVE TESTS. 
Page. 
39. Proposed soundness test for coarse aggregate ......„„„„„. 62 
40. Tentative test for absorption of concrete 62 
41. Proposed test for percentage of shale in gravel 62 
42. Proposed modification of the abrasion test for broken stone and slag 62 
43. Proposed abrasion test for fine aggregate 62 
44. Proposed field methods of making sieve analysis 63 
45. Proposed field determinations of clay and silt 64 
46. Proposed methods of fabricating and testing compression field specimens of 
concrete : 64 
47. Proposed methods of making test specimens of concrete in the laboratory. . 65 
48. Proposed transverse tests of concrete 66 
49. Proposed test for consistency of concrete 66 
50. Determination of percentage of pigment in paints 68 
51. Tests for the amount of spelter coating on culvert metal „ . 68 
RECOMMENDED STANDARD METHODS FOR SAMPLING. 
52. Broken stone 69 
53. Broken slag 69 
54. Stone block 70 
55. Gravel " 70 
56. Sand." 71 
57. Semigravel, top soil, and sand clay 72 
58. Bituminous materials 73 
59. Portland cement 74 
60. Paving brick 74 
61. Metal culverts 74 
62. Paint and paint materials .'. 74 
MISCELLANEOUS. 
63. List of apparatus for conducting tests of bituminous materials for road 
construction 75 
64. List of apparatus for physical testing of nonbituminous road materials 75 
65. The manufacture of a diamond core drill 76 
66. Forms for reporting tests 79 
67. Comparison of degrees Baume and specific gravity , 94 
68. Comparison of Centigrade and Fahrenheit degrees 94 
69. Metric conversion table 95 
70. References to tests for paint and paint materials, sewer pipe, drain tile, and 
metals 95 
ADDITIONAL COPIES 
OF THIS PUBLICATION MAT BE PROCURED FROII 
THE SUPERINTENDENT OF DOCUMENTS 
GOVERNMENT PRLNTLNG OFFICE 
WASHINGTON, D. C. 
AT 
25 CENTS PER COPY 
