he time an examiner in the ments undoubtedly helped to keep them afloat by pre- ular route. Here we see two distinct operations, one Hungarian Patent Office, he found an earnest col- venting the water from coming in very close con- in the field, the other in the office. They are both, of laborator.… … or negative current to lator, operating in con- flow. through the wheel juuction with alever main- tained continually in a horizontal position by floating the visible bubbles, they were surrounded by an en- to the receiving station, thereby swinging a mirror upon a cistern of mercury. This lever is…
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![An illustration from XIXe [i.e. Dix-neuvième] siècle (en France); classes - moeurs - usages - costumes - inventions. Ouvrage illustré d'un front. chromotypographique, de 16 planches coloriées aux patrons, de 36 entetes et lettres ornées et de 487 gravures (dont 24 tirées hors texte) d'après les principaux artistes du siècle (1893)](https://img.insideoutlibrary.com/img/200/ia-xixeiedixneuvi00granuoft-766-577.webp)
