Each part has special t.-p.: pt I, Longevity ... Biometry, (the measure or span of life.) ... An exposition of the laws of life ... By T. S. Lambert ... Followed by the two ($500) prize essays, on the Physical indications of longevity, by J. V. C. Smith ... [and] John H. Griscom ... To which is added a "Brief application of the exposition and essays;" including extracts ... from a paper by C. L. Hubbell ... pt. II, Longevity ... The practical relations of biometry ... Appendix ... by T. S. Lambert ... [and] Fred. Shonnard ... of the American popular life insurance company.