> Of Gene Mechtly >No. HP 44 and HB 130 are intended for regulation of retail trade which >requires precisions of only three significant digits.
Interesting. Thanks. >MP233 gives equivalents to many more digits. For example: >1 avdp. dram = 0.001 771 845 195 312 5 kilogram, quoted from page 11. However, this is also the same precision in Handbook 44. >I did not take the trouble to verify this number by way of >1 dram = 1/256 pound. Is it exact or rounded? I don't know. It is exact according to Handbook 44. Take a look. Exact values are underlined. Since Handbook 44 is online (and MP233 isn't), I would be happy if I could refer to it for the most precise definitions. If we can establish this, it would be good. The connected question is: which document has legal authority (MP233 or Handbooks 44/130)?
