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50 a year. Communications will be welcomed from any quarter. Abstracts of scientific papers are solicited, and twenty copies of the issue containing such will be mailed the author on request in advance. Rejected manuscripts will be returned to the authors only when the requisite amount of postage aocompanies the manuscript. M'hatever is intended for insertion rnust be autheotiuated by the name and address of the writer: not neoevsarilv for publication, but as a guaranty of good faith. We do notdoi:10.1126/science.ns-17.429.230-a pmid:17796252 fatcat:cbzrqp5gsngbfdqi7egabdmc2i