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Item is a colour thematic map (cartogram) identifying the prevailing (range of) wheat protein for wheat grown in western Canada (individual place names are identified). Map includes inset summary tables of average protein content by grade and province, a bar chart for the distribution of the samples tested showing the percentage falling within each one per cent range in protein content, and an explanatory note on the source and analysis of the data.

Item is a colour thematic map (cartogram) identifying the prevailing (range of) protein content for grain grown in western Canada during the 1927-1928 crop year with only the areas immediately adjacent railway lines are highlighted with coding. Individual place names are identified on map. Map includes inset tables summarizing by province and grade the number of samples, and the maximum, minimum, and average protein content.

Item is a colour thematic map (cartogram) identifying the prevailing (range of) protein content for grain grown in western Canada; only the areas immediately adjacent railway lines are highlighted. Individual place names are identified on map. Map has inset summary charts of maximum, minimum and average protein content by province and grades; and charts of the protein content distribution as a percentage of total samples tested.

Item is a colour thematic map (cartogram) identifying the prevailing (range of) protein content for grain grown in Western Canada during the 1929-1930 crop year; only the areas adjacent railway lines are highlighted. Individual place names are identified on map. Map has inset summary tables by province and grade showing the number of samples, and maximum, minimum and average protein content distribution; and summary tables showing the protein content as a proportion of the crop.

Item is a colour thematic map (cartogram) identifying the prevailing (Range of) protein content for grain grown in western Canada for the 1928 wheat crop; only the areas immediately adjacent railway lines are highlighted. Individual place names are identified on map. Map includes inset tables summarizing by province and grade the number of samples, and the maximum, minimum, and average protein content.