Frederick Burwicks modest but comprehensive and insightful intro- duction is preface enough to these sensible essays in the history and philosophical criticism of ideas. If we want to understand how some in- quiring and intelligent thinkers sought to go beyond mechanism and vitalism, we will find Burwicks labors of assembling others and reflect- ing on his own part to be as stimulating as anywhere to be found. And yet his initial cautious remark is right: approaches, not attainments. The problems associated with clarifying matter and form are still beyond any consensus as to their solution. Even more do we recognize the many forms and meanings of form, and this is so even for organic form. That wise scientist-philosopher-engineer Lancelot Law Whyte struggled in a place neighboring to Burwicks, and his essay of thirty years ago might be a scientists preface to Burwick and his colleagues: see WhyteS Accent on Form (N. Y., Harper, 1954) and his Symposium of 1951 Aspects of Form (London, Percy Lund Humphries 1951; and Indiana University Press 1961), itself arranged in honor of D Arcy Thompsons classical monograph On Growth and Form. Philosophy and history of science must deal with these issues, and with the mixture of hard-headedness and imagination that they de- mand.