Sbction III., 1906. [ 57 J Trans. R S. C. 



V. — On the Analysis of Wheatcn Flour. 



BY 



Thomas Macfaulane. 



Read May 23, 1.1)06. 



In a former paper presented to this section " On the determination 

 of the Constituents of Gluten," ^ a method of examining wheaten flours 

 was described which seemed to promise analytical results likely to bear 

 .aome definite relations to the phenomena observable in bread making. 

 It is well known that the same standard brands of flour vary from year 

 to year in regard to their excellence for yielding good bread, and it is 

 usually supposed that these variations are owing to differing climatic 

 conditions at the time of harvesting the wheats from which the flours 

 were produced. It was therefore thought possible that by applying the 

 method above mentioned to the examination of well known standard 

 grades of flour from year to year variations in their composition might 

 be detected which might be found to correspond with variations in their 

 excellence for purposes of bread making. Accordingly the two largest 

 flour milling companies in the Dominion were applied to for reliable 

 samples of their best products from the crops of the past three seasons. 

 These were supplied with the greatest willingness, the different grades 

 being as follows : — From the Lake of the Woods Milling Co., " Five 

 Eoses," " Patent " and " Medora " ; from the Ogilvie Flour Mills Co., 

 •'Eoyal Household" and " Glenora." 



The results of examining these five grades of flour from the crops 

 of 1903 and 1904 were given in my paper of last year, and since then the 

 same grades from the crop of 1905 have been subjected to exactly the 

 same processes of analysis as the former samples. Consequently the 

 the results of the examination of the same grades for three consecutive 

 seasons are now available for comparison. Besides the samples of 

 " Koyal Household " and " Glenora '' obtained direct from the Ogilvie 

 Flour Mills Co., the same qualities were purchased from Mr. A. Mar- 

 tin, a deaFcr in the city of Ottawa, Jan. 1, 1906, and examined in the 

 same manner. All the results have been given in Table I which hers 

 follows : — 



See Transactions, 1905 ; Section III, p. 17. 



