'Q. What is the Reason that in all measure of Ratios there is one particular Ratio whose Measure serves as the Modulus of that System.' ; Note referring to disturbance in one of Reid's Classes. 'Q. What is the Reason that in all measure of Ratios there is one particular Ratio whose Measure serves as the Modulus of that System.' 1 p. Note referring to disturbance in one of Reid's Classes. 1 p. [MS.2131.5 (23)] 18th century