Sentence:  The <WSD>aerophore</WSD> consists of a number of large or small cylinders as desired, which are lowered into the place with the workman. Connected with the cylinders is a long flexible tube almoast an inch in diameter of such strength that it cannot be damaged even by being trod upon. 
Meaning of the word marked with <WSD> tags:  A nineteenth-century device with breathing tubes used by miners and workmen in areas that contain toxic fumes.