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Publications of the

DEPARTMENT OF COMMERCEBUREAU OF ''STANDARDS

yWASHINGTON , D.C.

February 9, 1925.

LIST OFLETTER CIRCULARS.

Issued byDivision.

Date Title

LetterCircularLC-154

VI 1-4 11-5-21 Relation of the crimp of the filling to the

width of the goods after weaving.

0-7 11-5-21 Leather, paper, rubber, and textiles.

II 1-7 11-4-21 Reclamation of used lubricating oils.

V-6 11-5-21 The electrodepOsition of lead-tin alloys.

II-3 11-27-22 Liquid conversion table.

0-7 10-11-21 National Bureau of Standards.

0-7 10-20-21 Weights and measures.

II-9 11-2-21 List of communications of the gage section.

II-9 Procedure of tests and explanation of reportsof limit gages.

Shop inspection of taper thread gages.

11-9 11-21-19 Construction and . operation of projection appa-ratus for measuring. ccrcr ihf. gages and profiles.

II-9 9-21-18 Interchangeability of U. S. Standard and BritishStandard Whitworth threads by diameter modifica-tion.

II-9 3-4-20 Services available at the Bureau of Standards

gage laboratory.

r

Letter Circular 154—February 9, 1925. 2

No. Issued byDivision.

Date Title

17 1 1-9 2-10-19 Drawings and explanation of drawings used inmanufacture of pitch, testing device.

18 II-9 5-10-23 Important European screw thread systems, anddimensions of bolt and screw heads, and nuts.

19 II-9 (3eingrevised)

Thread form and clearance of thread gages.

20 II-9 6-21-19 The measurement of radii on profiles.

21 II-9 7-14-19 Tne micrometer microscope and its uses in gageinspection.

22 1 1-9 8-15-19 The measurement of taper gages.

23 II-9 7-14-23 Measurement of pitch diameter of screw threadgages.

24 II-9 3-1-23 Standard thicknesses of sheet metal.

25

26 0-7 10-19-21 Celluloid. Monograph on this subject.

27 D 10-11-21 Twelve examples of work accomplished by the

Bureau of Standards. *... I

vy

* .' - «• f . . • . .« *

28 I II-

7

11-15-24 Anti-Freezing solutions for automobile radia-tors.

29 VI-5 &III-6

11-16-21 Ideal wall construction.

30 1 1 1-3 11-21-21 Information on refrigeration.

31 III 11-22-21 Heat, List of publications on

32 IV Methods of silvering glass.

33 V-6 12-1-21 The structure and properties of alternatelyelectrodcpositcd metals.

34 V-6 12-1-21 Lead plating from fluoborate solutions.

35 1 1 1-7 1-7-21 Publications pertaining to petroleum products.

36 I 1-20-22 Public Utilities,

37

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Letter Circular 154--Eebihiafy 9, 1925.

Ho. Issued "by HateDivision.

Title

38 III-7 1-20-22 Reports and papers relative to the Investiga-tion of automotive power plants.

39

40 1-6 1-24-22 Radio publications of the Bureau of Standards.

41

42 V-l 2- -22 Acid proof coatings for concrete surfaces.

43

44

45

46

47

48

49

50 1-6 11-4-22

51 1-6 11-4-22

52 0-7 11-8-22

53 VI-5 11-28-22

54 II-8 3-14-22

55 II-8 3-15-22

56

57 VI1-3 1-2-23

Bibliography of books and titles of period-icals on properties and use of insulating mater-ials.

List of the more important U. S. patents cover-ing the materials and the methods of manufactureof an insulating material.

Miscellaneous facts about glue.

Investigation of effect of Su-dex process of

treatment on physical properties of several woods.

Protection of track-scale parts from corrosion.

Equipment for testing and adjusting railroadtrack scales.

Tests on asbestos and rubber sheet packing.

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Letter Circular 154—February 9, 1925 4

No. Issued byDivision.

Date Title

58 II-l 3-29-22 Specifications for 3-inch sieves.

59 V-l 11-15-24 List of publications on paints, varnish, etc.

60 1-8 4-20-22 Publications of the Bureau of Standards of interest in connection with accident preventionand safety.

61 VIII 4-26-22 Hardened copper.

62

63 0-7 5-8-22 Testing of spark plugs.

64 V-l 5-9-22 Shingle stains.

65

66

67 IV-4 6-8-22 Method for designing an objective for anastronomical telescope.

68

69 V-7 7-1-22 A portable permeability apparatus.

70 III-6 &V-7

7-3-22 The safety of portable motion picture projectors.

71 III-6 7-3-22 Tentative classification of building con-

struction with reference to fire resistance.

72 II-l 7-26-22 Sieve testing apparatus.

73 1-6 8-1-22 Fees for testing radio apparatus.

74 II-l 8-4-22 Standard specifications for sieves.

75 1-6 8-21-22 The secondary standardization of radio wave-

meters.

76 1-6 8-21-22 The standardization of inductors at radio

frequencies.

77 1-6 8-21-22 The comparison of condensers at radio fre-

quencies.

78

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Letter Circular 154-Pebruary 9, 1925 5

No. Issued "by

Division.Date Title

79

80 1-9 9-19-22 Publications relating to gas.

81 II-8 10-10-22 Specifications for paint for use on railroadtrack scales.

82 V-6 10-10-22 The control of acidity in nickel deposition.

83 V-6 10-10-23 The purity of nickel salts.

84 VI 1-3 2-9-23 Tests of pneumatic tires and inner tubes.

85 1-4 1-1-23 Pecs for magnetic testing.

86

87 1-6 1-27-23 Methods of measuring properties of electrontubes.

88 II-8 2-12-23 Performance of railroad track scales.

89 11-4 3-12-23 Conversion tables for petroleum oils.

90.

91 II 4-13-23 Pitting of plugs for class 3 weights.

92 1-6 4-25-23 Radio signals of standard frequency, andtheir utilization.

93

94 VI-5 6-7-23 Calibration boxes.

95

96 II-4 6-9-23 Specific gravity and weight per gallon of

milk and cream.

97 VI 1-3 7-10-23 Upholstery leather.

98

99 VII-3 8-1-23 Tests on asbestos and rubber sheet packing.

100 III-3 8-2-23 Oil heating.

101

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letter Circular 154—February 3, 1925 6

Ho, Issued "by

Division.Date Title

102

103 1-6 3-22-23 Design of a series of single-layer inductancecoils suitable for radio frequency standards.

104 VII 1-2 10-3-23 Heat treatment of steel. (Reprint of LetterCircular VII 1-2 Ho. 82).

105 1-6 10-31-23 Application of statistical analysis to radiotransmission problems.

106 VII-3 11-14-23 Upholstery leather. (II).

10? 17-5 12-6-23 Emissivity of paints for radiators, canopies,etc.

108 II-9 12-21-23 Lead errors in commercial screw threads, taps,

and dies.

109

110 1 1 1-3 1-26-24 Information on heating and ventilation.

111 VII 1-2 2-12-24 Characteristics, treatment and uses of high-speed tool steels. (Reissue of Circular Letter71 I 1-7, April 17, 1920).

112 A D 2-18-24 Twelve outstanding accomplishments of the

Bureau of Standards in 1923.

113 III-6 2-27-24 Eire resistance of clay hollow wall tile.

114 1 1-4 3-25-24 Petroleum oil table, volume at 60° F. occu-

pied by unit volume at indicated temperature.

115 7-6 3-27-24 Behavior of nickel anodes.

116 II-O 4-9-24 Conversion tables.

117 17-5 4-24-24 Selenium cells.

118 71 II-O 4-25-24 Publications of the Division of Metallurgy.

119 A D 5-1-24 Bureau of Standards research associate plan.

120 7-6 5-7-24 Conductivity of nickel solutions.

121 7-6 5-12-24 Publications on electrodeposition from the

Bureau of Standards.

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Letter Circular 154—February 9, 1925. 7

Ho. Issued byDivision.

Date Title

122 VI-5 5-27-24 Memorandum on specimens for fiber rope.

123 1-6 6-30-24 Kilocycle-moter conversion table.

124 7-2 7-16-24 Recommended specification for powdered ammonia

125 V-6 7-28-24 Throwing power in copper and nickel deposition

126 VI-5 7-28-24 Brinell hardness numbers.

127 II-8 8-13-24 Type registering weigh beams.

128 II-8 9-12-24 Specifications for hand operated grain hopperscales.

129 II-O 9-27-24 State laws, and rules and regulations relatingto milk bottles.

130

131 IX 11-11-24 Publications relating to ceramics.

132 0-7 11-11-24 The organization and work of the United StatesBureau of Standards.

133 m-? 12~j 24 f./-' I'U.'l v *V -l -a! Oi-,

134 III-3 11-28-24 Painting of steam and hot water radiators.

135 II-8 12-4-24 General report of the railroad track scaletesting service of the Bureau of Standards,July 1, 1923 to June 30, 1924.

136 VI-5 12-5-24 Memorandum regarding preparation of wire ropespecimens for tensile strength tests.

137 1 1 1-3 12-13-24 The safety of theater proscenium curtains.

138 0-7 12-15-24 Publications relating to building materials,construction, and building codes.

139 VII-2 10- -20 Report of service test on concrete floortreatments.

140 VI 1-2 9- -21 Blast furnace slag as concrete aggregate.

141 VII-2 031Oi

—

1

Inspection of Portland cement.

_

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Letter Circular 154—.February 9, 1925. 8

•o Issued byDivision.

Date Title

142 VI1-2 8- -21 Principal requirements of the Portland cement

specifications of various countries.

143 VI1-4 9- -24 List of publications on textiles.

144 VI 1-7 List of publications on lime.

145 VI 1-7 List of publications on gypsum.

146 VI 1-7 List of publications on sand-lime brick.

147 VIII 7-26-20 Sources of information and data on the pro-perties of metals and alloys.

148

149 VIII Welding practices* ,

150 1 1-4 1-26-25 Dry etching of glass.

151 VI1-3 1-27-25 Analysis of raw tanning materials.

152 1 1-8 1-27-25 Specifications for the manufacture and in-

stallation of motor-truck, built-in, self-

contained, and portable scales for railroadservice.

153 1 1-4 2-7-25 Abridged volume correction table for petroleumoils.

154 0-7 2-9-25 List of letter circulars,.

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