Pray can you tell me, --that is, without anger, before I write my chapter upon straight lines----by what mistake----who told them so----or how it has come to pass, that your men of wit and genius have all along confounded this line, with the line of GRAVITATION?

Pray can you tell me, without anger, before I write my chapter upon straight lines - by what mistake it has come to pass, that your men of genius have all along confounded this line with the line of Gravitation?