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Volumes

1. Vol 1 The Instrument and Why Cavity Work Exists What an embalming trocar physically is — a long hollow tube with a pointed tip that both withdraws and delivers — and why cavity treatment stands alongside arterial injection rather than replacing it.
2. Vol 2 The Water-Jet Aspirator: Suction From a Tap How a hydro-aspirator makes vacuum out of nothing but mains water — the Venturi jet pump with no moving parts — why it lives or dies by line pressure, and the plumbing hazard that kept the trade honest about it.
3. Vol 3 Origins and Makers: Rodgers, Billow, and a Borrowed Instrument Where the embalming trocar actually came from — a surgical drainage tool centuries older than embalming, simplified for the shop; the contested credit between Samuel Rodgers's 1880 patent and the folkloric 1868 date; and the makers, then and now, who put the instrument in the case.
4. Vol 4 Preservation You Could Ship How cavity treatment completed arterial injection, turned embalming into transport-ready durable preservation, and helped drive the undertaker's trade from itinerant craft to licensed profession between the 1870s and 1900.
5. Vol 5 Collecting Trocars and Aspirators How a collector identifies and dates a cavity outfit — reading the metal and its finish, the point and button patterns, and the pump behind the tube — and why the safe thing to do with a surviving instrument is to clean it, catalogue it, and display it cold.