See 102r and the Translation Protocol and Vocabulary
Return "Royal Cement" on 102r to French, add <fr> tags, and add the following comment: Cotgrave does not give an English equivalent but defines "ciment royal" as "An excellent Cement, or Solder, used by Goldsmiths; (heretofore Mintmen compounded a Cement for the tryall of gold, and tearmed it so.)"