- When it is known or suspected that saccharine or other matter, of such a nature as to prevent the true strength being ascertained by means of the hydrometer, is present in spirit, the number of degrees to be added to the apparent strength on account of obscuration shall be certified by the Chemical Examiner to the Government of West Bengal on analysis of a sample of the spirit submitted to him, and duty shall be calculated on the quantity and strength of such spirit after the addition of the number of degrees of proof certified as necessary to be added to the apparent strength, as ascertained by the hydrometer.
