An Inexpensive, Automatic Melting Point Apparatus The melting point continues to be a. physical constant useful for purposes of quslitntive analysis and in estimating the p1rrit.y of a substance. Traditional laborat,ory methods for observing and recording melting point informxt,ion are time-consnming. To date, automatic melt,ing point zppnratus described in the literat,ure or avdahlo commercially require expensive recording systems. This instnunent incorporates an inexpensive recording device, a Polaroid Swinger hlodd 20 camern, which produces n permanent pict,ure of the meking point. An nsbentos-covered wire was wound around a brass block fabricated to accomodate a thermometer and melting point, capillary. A hole w~ drilled in
