IX. SUMMARY OF ANALYSES In general the values here given represent the averages of all determinations. In certain cases, for reasons explained on the certificates, other values are given in these tables and are recommended by the Bureau of Standards. "It is believed that these results for carbon may be slightly lower than the truth. The matter is being investigated at the Bureau and elsewhere. * Values derived from a small number of determinations at the Bureau of Standards, and not so well established as the other values. UNIV. OF MICHIGAN, JUN 22 1914 INSERT TO ACCOMPANY BUREAU OF STANDARDS CIRCULAR 25 STANDARD ANALYZED SAMPLES ISSUED OR IN PREPARATION The samples are numbered consecutively nearly in the order of issuance of the first representative of each kind. Renewals of a sample are indicated by the original number, with an added letter to denote its intended relation. Thus, 4a is the first, 5b the second renewal of irons B and C, respectively. In this way a given number will always represent a material of fixed, or approximately fixed, composition. Numbers missing from the series in the following table represent samples of which the supply has become exhausted, and which it is not the present intention to replace. 1 See Paragraph IX, Circular 25, for discounts and ordering and shipping regulations. 37384-14 |