Some Important Books Received: Books on Steel, An American Handbook, A Dictionary and A Book on Gliding Reviewed

It was stated in the daily Press recently that an all‐metal aeroplane was being constructed entirely of stainless steel and that such a construction had become possible owing to the introduction of a new stainless steel which could be rolled into thin sheets or strips heat‐treated to give the high strengths and ductility necessary in aircraft structures. An all‐stainless machine would bo extremely interesting as an experiment, but it is doubtful whether such a machine is desirable or would be commercially practicable.