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I came across some instructions for resilvering a sextant mirror in a
1919 issue of the US Naval Institute Proceedings. Some of the supplies
may be hard to find nowadays, such as the tinfoil wrapper on a pack of
cigarettes.

"At present when ships are making long sea voyages, frequently the
navigator will find that his sextant mirrors are going bad and no spares
available. He is also apt to find his sextant mirrors in such condition
that although the sun can be handled, great difficulty is encountered
with stars."

https://books.google.com/books?id=sX-kfItGYgYC&jtp=245

There's also a sight reduction article. "When one must work in a sweat
box, such as a chart house becomes when the ship is darkened, any method
that shortens the work at that time is most welcome. Though there is
nothing startling in the following process, it is something that no
navigator I have met has used, and one of which none of the younger
officers I have come in contact with have ever heard... The process is
simply to combine, before sunset, all the elements of the work of the
haversine formula possible, leaving very little to do after star sights
are taken."

https://books.google.com/books?id=sX-kfItGYgYC&pg=PA41

An article on "Feed Water Temperature" by P.V.H. Weems shows that his
interests were not confined to navigation.
https://books.google.com/books?id=sX-kfItGYgYC&jtp=383

"The Crossing of the Atlantic by Air" makes an argument for the airship,
the author demonstrating mathematically that a crossing by airplane
would be a freak occurrence. His estimates of starting fuel (3 tons, or
830 Imp gal) and ground speed (120 kt) for a notional airplane are
remarkably close to the values for the successful flight a few months
later. But he estimated 13.4 flight hours until fuel exhaustion, while
Alcock & Brown flew 16 hours and still had a fuel reserve when weather
forced them down.
https://books.google.com/books?id=sX-kfItGYgYC&jtp=459

Tables of contents from the 1919 volume:
https://books.google.com/books?id=sX-kfItGYgYC&pg=PP17&focus=viewport
https://books.google.com/books?id=sX-kfItGYgYC&pg=RA1-PA184-IA5&focus=viewport
https://books.google.com/books?id=sX-kfItGYgYC&pg=RA1-PA316-IA5&focus=viewport
https://books.google.com/books?id=sX-kfItGYgYC&pg=RA1-PA492-IA5&focus=viewport
https://books.google.com/books?id=sX-kfItGYgYC&pg=RA1-PA718-IA5&focus=viewport
https://books.google.com/books?id=sX-kfItGYgYC&pg=RA1-PA876-IA13&focus=viewport

   

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