tructedwas, generally speaking, working satisfactorily;but it contained no protection against the gascorroding the machinery ; and wherever badgas was found, corrosion was likely to ensue. Itwas this cause, and this alone, that had pro-duced the results of which the superintendentof the Deptford… … VERTICAL SECTION OF DEFRIEs PATENT DRYGAS METER. in the model before them, the machinery wassecure from the action.of the gas, and whichoffered the most efficient protection against thegreatest impurity. The lecturer having thenstated that his meter was the best yet foundout for detecting fraud on…
Design · Decoration and ornament · Art
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer02inte-165-73.webp)
