The following table contains values of Tamkin calculated for latitudes zero through sixty degrees (inclusive) on a five-hundred-metre scale graduated into multiples of twenty-five.
The uppermost orange-coloured horizontal line of values on the table represents elevations from zero to five hundred metres graduated from left to right, and the first vertical line of orange-coloured figures arranged so as to increase on a downward direction indicates latitudes from zero to sixty degrees. Figures whereon the two lines of values intersect are the values of Tamkin in minutes and seconds. For instance, period of Tamkin for an elevation of 250 metres on latitude 2° is 6 minutes and 25 seconds, as is indicated in orange colour on the following table.
TIME CALCULATION DIRECTORATE