Throughout 1915 and 1916 a study was made of the dietaries of forty-seven labouring class families in Glasgow, and in February 1917, shortly after the publication of the Devonport Voluntary Ration, ten of the original families were investigated for a second time. The results of all these studies were published in the Proceedings of the Royal Society of Edinburgh, vol. xxxvii, p. 117, 1917.

In November 1917, after nine months of voluntary rationing, after the price of bread had been reduced from to per 2 lbs., and just before the introduction of the Rhondda Voluntary Ration, the diets of eight of the families were studied for a third time.