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I think a nice IV of WildFlower Mead should do your husband good. Also, thanking your son for his service to this great country of ours!

It is not as accurate as hydrometry as mentioned above....but "good enough" to follow the progress of a fermentation. I have prepared a document describing the process and procedure: See http://www.moundtop.com/fermentation/RBRIX-ATC-Fermentation-Tables.pdf The refractometer approach's biggest problem is that it cannot be used to reliably to indicate dryness (end of fermentation). However, even a hydrometer comes up short here. As an amateur winemaker I rely upon Clinitest tablets to estimate the residual sugar level indicative of dryness. As always, there are many ways to sk

You need the pre-ferment refractometer readings. Then, you can use some estimations/calculations down to the end. Not as accurate as a hydrometer, IMO but many people use it.