The formation of vegetable mould, through the action of worms, with observations on their habits.

First edition, 1881.

The formation of vegetable mould, through the action of worms with observations on their habits. Seventh thousand (corr.)

"Corrected."

Dust recovery practice at blast furnaces; an evaluation of settleable solids formation and recovery at mills in the Ohio Valley and a suggested proceedure [sic] for defining performance of wastewater clarifiers.

"Reference data publication."