Safety valves
Subtitle: the judges' award
Contributors: Bartley, W. P.; Wright, James, fl. 1884; Dominion Exhibition (1884 : Montréal, Quebec)
Publisher: [s.n.]
Published: 1884
Place of publication: Montréal?
Language: eng
Subjects: Relief valves; Soupapes de décharge
Notes: Broadside.

"To T.C. Stevenson, Esq. Secretary Dominion Exhibition".

Signed: Robt. Romaine, W.P. Bartley, Capt. James Wright.

Dated: Montreal, September 13, 1884.

"We, the undersigned judges in the mechanical department ... find the Porteous valve to be superior ... ".