Mesomeric effect attributed to a substituent[?] in chemical compounds due to overlap of its p- or pi-orbitals with the p- or pi-orbitals of the rest of the molecular entity. The effect is symbolized by M.
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... 1904 in sports
Events:
January 7 - The distress signal[?] "CQD" is established only to be replaced two years later by "SOS."
February 7 - A fire in Baltimore, ...