Howard's patent ventilator, a scientific invention of cheap construction, applicable at small cost to all buildings, railroad cars, passenger vessels, &c., and a perfect means for the introduction of pure fresh air, without draught
Publisher: Printed at the; "News" Book and job printing Off.
Published: 1869
Place of publication: St. Johns
Language: eng
Number of pages: 15
Subjects: Ventilators; Air filters; Filtres à air
Notes: Cover title.