The ancient Romans were masters of building and engineering, perhaps most famously represented by the aqueducts.

The ancient Romans were great builders, especially known for their aqueducts. These are still standing today because they ...

Mixing quicklime with water produces slaked lime, or calcium hydroxide: a slightly less reactive, less caustic paste.

Although aqueous solutions of 'slaked' lime are alkaline, its solubility in water is so low that the solution would not be a caustic hazard (causing chemical burns) used in a hand warmer.

One of these is a method for extracting ammonia from gas water. The gas water is put into a retort with slaked lime, and distillation performed as in the guano process. An improvement was made and ...