A very detailed description of the process developed by Frederic Carder at Steuben. It is quite illuminating:
Carder established the etching room at Steuben about 1906. He had become familiar with the process of etching designs on glass early in his career at Stevens & Williams, where he used it as the first step in the productions of cameo glass. The acid-etched pieces produced at Steuben were made by transferring the design to the glass by means of a print made on paper in a "wax ink".
This print was taken from a plate etched with the reverse, or negative, of the pattern desired. The plate could be of glass or metal. Carder usually used a sheet of plate glass about one-quarter inch thick because it was cheaper than steel or copper. The pattern plate was warmed slightly, and the etched portion filled with "ink", which was a compound of asphaltum, beeswax, gum mastic, and turpentine. These elements were proportioned to form a paste that, when warm, was about the consistency of peanut butter; it spread easily into every detail of the etched pattern. After the excess ink was scraped off, a special transfer paper was placed on the warm ink and rubbed down just enough to make the ink adhere to the paper when the paper was peeled back from the plate. The paper with the design in ink was then applied to the glass object and rubbed down with a felt "rubber" to ensure a perfect union between the glass and the ink. Next, the paper was moistened with water and peeled away, leaving the ink pattern on the glass object to be etched.
The portions of the glass not covered with the pattern were painted with wax to protect them from the etching acid. Then the object was immersed in the etching acid for the time required to etch the designs to the desired depth. Afterward, the wax coating was removed, revealing the completed etched design. Etched patterns were discontinued about 1934.
A photo of some matching pieces to your salad bowl.