"A new science must be pursued historically, the only thing to be done being to study in chronological order the different works which have contributed to the progress... But when such materials have become recast to form a general system, to meet the demand for a more natural logical order, it is because the science is too far advanced for the historical order to be practicable or suitable. ...By the dogmatic method ...must every advanced science be attained, with so much of the historical combined with it as is rendered necessary..."