A recent reference question led to a series of searches and ultimately was answered by a journal published nearly a century ago.
The requester sought information about the "Walker inversion method for sucrose apparent determination." He was under the impression that the method was originally published in a FAO manual from 1979, for which he had only a partial citation.
It turned out that the manual in question was no. 14/3 of the serial entitled FAO Food and Nutrition Paper. That issue, "Manuals of food quality control: 3. Commodities," was indeed published in 1979. According to the foreword, it provides "methods useful for the examination of foods and for their chemical analysis." It is divided by type of food, with most food items having several different methods of analysis.
The requester's incomplete citation indicated page 150, which was within the chapter about honey. The heading reads "Apparent Sucrose Content in Honey." Under Principle, it says "Based on the Walker (1917) inversion method." At the bottom of the page appears a brief reference: Walker, H.S. (1917), J. Ind. Eng. Chem. 2, 490.
The Journal of Industrial and Engineering Chemistry is the current name of a Korean publication and the former name (from 1909 to 1922) of a journal currently called Industrial and Engineering Chemistry, published by the American Chemical Society. (Our library does not have a subscription to either one.)
The older journal was the one we wanted. Amazingly, all of the articles from 1909 to 1922 are available online (at a cost) in pdf. The one our requester needed is here.
The full citation follows: