Chemical and Mechanical Deposits. — Cementing together of Particles. —
Hardening by Exposure to Air. — Concretionary Nodules. — Consolidating
Effects of Pressure. — Mineralization of Organic Remains. — Impressions
and Casts: how formed. — Fossil Wood. — Goppert’s Experiments. —
Precipitation of Stony Matter most rapid where Putrefaction is going
on. — Sources of Lime and Silex in Solution.