Specification of Gustav Alsing
Subtitle: treating sewage, &c
Publisher: Great Seal Patent Office
Published: 1873
Place of publication: London
Language: eng
Subjects: Sewage; Manures; Gypsum
Notes: Cover title.

At head of title: A.D. 1873, 9th April. No. 1319.

"Gustav Alsing, civil engineer, 3, Bank Place, Preston, Lancashire".