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Volumes

1. Vol 1 The Machine on the Cart What an electric embalming machine is — a motor-driven pump feeding a graduated tank, with a pressure gauge and a separate rate-of-flow control the operator sets and holds — and why the ESCO Porti-Boy became its archetype.
2. Vol 2 The Engineering: Pumps, Seals, and the Return of the Pulse How the electric machine actually moves fluid — why a centrifugal impeller replaced the pulsing hand pump, why the chemicals forced a sealless magnetic drive, and why the pulse the machine had eliminated was later deliberately put back.
3. Vol 3 Porti-Boy, Duotronic, and the Maker Lineage How two long-lived American machines — ESCO's portable Porti-Boy and the electronically controlled Duotronic — standardised in the 20th century what gravity bottles and hand pumps had done by hand, and how a collector reads a maker's badge to place a surviving unit in that lineage.
4. Vol 4 The Fluid in the Tank: From Arsenic to Formaldehyde The chemistry that the electric machine was built to pump — how a laboratory curiosity identified in the 1860s, and an accidental discovery in 1893, displaced the arsenical poisons of the Civil-War trade and, together with the motorized pump, defined modern arterial embalming.
5. Vol 5 Collecting the Electric Machine Safely How motorized embalming machines reach the estate-sale table, how to read and date one, how to grade its gauge, tank glass, motor and seals — and why the residue of a century of chemistry makes the safe posture display, not use.