Good advice?

I got this with some very exciting Tabloid developer from Burroughs Wellcome & Co.
I can't find a date, probably ± 1926, "for Gaslight Papers and Lantern Slides".
Not sure if I want grease on my fingers when handling film in the developer...

("Hazeline" still exists; I will explain the word Tabloid when I show the results of the developer test later, it's interesting.)