Yes, I found online references to Wood's grating, but I wasn't able to understand its specific use, so I appreciate your reply.
And thanks for the link, I found the biography of Wood quite informative...and now realize the connection between his copy of Physical Optics textbook by Wood (my...
I am not a physics student, but my father was.
I found a "Wood's Replica Grating" among his belongings after he died and have been scouring the internet trying to understand what this replica grating was used for. I think I am on the right track with optics, but I'd like to know more...