Thislittletreatiseisextractedfromalargerworkundertakenatanearliertimewithoutconsiderationofmycapacity，andlongsinceabandoned.Ofthevariousfragmentsthatmightbeselectedfromwhatwasaccomplished，thefollowingisthemostconsiderable，andappearstometheleastunworthyofbeingofferedtothepublic.Therestoftheworkisnolongerinexistence.