Mark Osterman has a very fine lantern slide formula for both in-camera and duping purposes. I have included that into the book with Mark's gracious permission. I have also included photos of his plate pouring method. Also included are scans of his original negative dry plate and the resulting lantern slide.
The Formulary is now selling both 4x5 and 8x10 glass for this, and I am told that they will custom cut glass for suitably large orders.