Part ii

, and I refer sections 44 and 45 to the _Fourth_ Part of the Treatise, and not to the _Second_ at all[49]. For if we run through the contents of Parts Three and Four (p. 177), we observe that they chiefly involve tables, with reference to one of which we find the words 'upon which table ther folwith a _canon_,' &c. Now sections 44 and 45 exactly answer the description; they are alternative _canons_, shewing how certain tables may be used. It happens that Conclusion 40 is

## particularly dependent upon tables. To supply these was partly the object

of