I found this wonderful book on Google Books. Go to the book page under Google, then search under Sydney Camm (spelling is important) and you can download a pdf of it complete with illustrations of numerous metal fittings for FREE.
It was written in 1919.
There's a lot of discussion about different varieties of wood and their use in aeroplane construction. He also observes that designing in wood makes sense because the art is advancing so fast you wouldn't want to be inhibited by a huge investment in the tooling required for other types of construction.
This is very similar to an observation by Neville Shute (Norway), the author and founder of Airspeed, the English aeroplane manufacturing concern. Anyone interested in the development of aviation both from a design and business standpoint would find Shute's book "Slide Rule" a delight.