2018-05-252018-05-251967-01-05http://hdl.handle.net/2152.3/8906Correspondence to Colonel T.A. Glasgow from Robert Aronson, Associate Editor of Machine Design Journal, regarding a request for illustrations of the spring/mass pendulum to be included in a future article.Machine DesignDr. William ThorntonMMDmass measurement deviceSpace MedicineColonel T.A. GlasgowRobert AronsonresearchCorrespondence