xxu

PREFACE.

the writing, I shall readily acknowledge them all myown, and am, I confess; under no great concern aboutthem, provided the matter in general may be found'useful and answerable in the application os it to truthand nature; in which material points,-is the readershall think,st to rectify any mistakes, it will give me asensible pleasure, and be doing great honour to thework.

ADVERTISEMENT.

For the more easy finding the figures referred to in thetwo prints belonging to this work y the references are forthe 7nofi part placed in the margin. Fig. T. p. i. -signi-fies the top of plate i. L. p. i. the left fide. R. p. i.the right fide. B. p. i. the bottom. And where a figure isreferred to in the middle of either prints it is only markedthus , fig. p. i .or fig. p. 2 .