Section 5. A notification made under this Act may be revoked or varied by the authority making it by a notification

1, 2 148 Petroleum. [ACT XII (Miscellaneous 25. A notification made under this Act may be revoked or varied by the authority making it by a notification 1, 2 148 Petroleum. [ACT XII (Miscellaneous.—Section 26.—The Schedule.) notification published in the same manner as the notification so revoked or varied. Procedure formaking and publication of rules. 5. Correction for atmospheric pressure.—As the flashing point of an oil is influenced by changes in atmospheric pressure to an average extent of 1·6° Fahrenheit for every inch of the barometer, a correction of the observed flashing point may become necessary. The height of the barometer must therefore be determined at the time of making the test for the flashing point. The true height of the barometer for the purpose of the test shall be considered to be the height of the column of mercury measured at 32° Fahrenheit, which is supported by the air pressure at the time of the experiment; that is, the actual height of the barometer at the time of observation duly corrected for any error of the instrument and for its temperature if necessary. For the purpose of applying the correction to the flashing point of the oil obtained by the test, a table is appended to this schedule, giving the flashing points of oils ranging from 65° to 80° Fahrenheit, under pressure ranging from 27 to 31 inches of mercury. The table is used in the following manner:— Example.—An oil has given a flashing point of 71°, the barometer being at 28·6 inches; take the nearest number to 71° in the vertical column headed 28·6. This number is 70·8. Substitute for this the number in the same horizontal line in the column headed 30 (the normal height of the barometer). The substituted number, that is, the true flashing point of the oil, is 73°. Table Petroleum. [ACT XII (The Schedule.) Table for correction of Flashing Points indicated by the Test for Variations in Barometric Pressure on either side of Thirty Inches. Barometer in Inches. | 27 | 27·2 | 27·4 | 27·6 | 27·8 | 28 | 28·2 | 28·4 | 28·6 | 28·8 | 29 | 29·2 | 29·4 | 29·6 | 29·8 | 30 | 30·2 | 30·4 | 30·6 | 30·8 | 31 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | Flashing Point in Degrees Fahrenheit. | 60·2 | 60·5 | 60·8 | 61·2 | 61·5 | 61·8 | 62·1 | 62·4 | 62·8 | 63·1 | 63·4 | 63·7 | 64 | 64·4 | 64·7 | 65 | 65·3 | 65·6 | 66 | 66·3 | 66·6 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | 61·2 | 61·5 | 61·8 | 62·2 | 62·5 | 62·8 | 63·1 | 63·4 | 63·8 | 64·1 | 64·4 | 64·7 | 65 | 65·4 | 65·7 | 66 | 66·3 | 66·6 | 67 | 67·3 | 67·6 | | 62·2 | 62·5 | 62·8 | 63·2 | 63·5 | 63·8 | 64·1 | 64·4 | 64·8 | 65·1 | 65·4 | 65·7 | 66 | 66·4 | 66·7 | 67 | 67·3 | 67·6 | 68 | 68·3 | 68·6 | | 63·2 | 63·5 | 63·8 | 64·2 | 64·5 | 64·8 | 65·1 | 65·4 | 65·8 | 66·1 | 66·4 | 66·7 | 67 | 67·4 | 67·7 | 68 | 68·3 | 68·6 | 69 | 69·3 | 69·6 | | 64·2 | 64·5 | 64·8 | 65·2 | 65·5 | 65·8 | 66·1 | 66·4 | 66·8 | 67·1 | 67·4 | 67·7 | 68 | 68·4 | 68·7 | 69 | 69·3 | 69·6 | 70 | 70·3 | 70·6 | | 65·2 | 65·5 | 65·8 | 66·2 | 66·5 | 66·8 | 67·1 | 67·4 | 67·8 | 68·1 | 68·4 | 68·7 | 69 | 69·4 | 69·7 | 70 | 70·3 | 70·6 | 71 | 71·3 | 71·6 | | 66·2 | 66·5 | 66·8 | 67·2 | 67·5 | 67·8 | 68·1 | 68·4 | 68·8 | 69·1 | 69·4 | 69·7 | 70 | 70·4 | 70·7 | 71 | 71·3 | 71·6 | 72 | 72·3 | 72·6 | | 67·2 | 67·5 | 67·8 | 68·2 | 68·5 | 68·8 | 69·1 | 69·4 | 69·8 | 70·1 | 70·4 | 70·7 | 71 | 71·4 | 71·7 | 72 | 72·3 | 72·6 | 73 | 73·3 | 73·6 | | 68·2 | 68·5 | 68·8 | 69·2 | 69·5 | 69·8 | 70·1 | 70·4 | 70·8 | 71·1 | 71·4 | 71·7 | 72 | 72·4 | 72·7 | 73 | 73·3 | 73·6 | 74 | 74·3 | 74·6 | | 69·2 | 69·5 | 69·8 | 70·2 | 70·5 | 70·8 | 71·1 | 71·4 | 71·8 | 72·1 | 72·4 | 72·7 | 73 | 73·4 | 73·7 | 74 | 74·3 | 74·6 | 75 | 75·3 | 75·6 | | 70·2 | 70·5 | 70·8 | 71·2 | 71·5 | 71·8 | 72·1 | 72·4 | 72·8 | 73·1 | 73·4 | 73·7 | 74 | 74·4 | 74·7 | 75 | 75·3 | 75·6 | 76 | 76·3 | 76·6 | | 71·2 | 71·5 | 71·8 | 72·2 | 72·5 | 72·8 | 73·1 | 73·4 | 73·8 | 74·1 | 74·4 | 74·7 | 75 | 75·4 | 75·7 | 76 | 76·3 | 76·6 | 77 | 77·3 | 77·6 | | 72·2 | 72·5 | 72·8 | 73·2 | 73·5 | 73·8 | 74·1 | 74·4 | 74·8 | 75·1 | 75·4 | 75·7 | 76 | 76·4 | 76·7 | 77 | 77·3 | 77·6 | 78 | 78·3 | 78·6 | | 73·2 | 73·5 | 73·8 | 74·2 | 74·5 | 74·8 | 75·1 | 75·4 | 75·8 | 76·1 | 76·4 | 76·7 | 77 | 77·4 | 77·7 | 78 | 78·3 | 78·6 | 79 | 79·3 | 79·6 | | 74·2 | 74·5 | 74·8 | 75·2 | 75·5 | 75·8 | 76·1 | 76·4 | 76·8 | 77·1 | 77·4 | 77·7 | 78 | 78·4 | 78·7 | 79 | 79·3 | 79·6 | 80 | 80·3 | 80·6 | | 75·2 | 75·5 | 75·8 | 76·2 | 76·5 | 76·8 | 77·1 | 77·4 | 77·8 | 78·1 | 78·4 | 78·7 | 79 | 79·4 | 79·7 | 80 | 80·3 | 80·6 | 81 | 81·3 | 81·6 |