. Journal of radiology . is vastly further in the scheme of evo-lution from peas to mice than it isfrom mice to man. Mice are mammalslike man; their structure is like mans—a head, a trunk, four limbs. Theirorgans are like mans, arranged in thesame relation to each other, made outof the same types of materials, func-tioning in the same way for the main-tenance of the organism. If we cut amouses arm it bleeds like mans, andthen regeneration sets in as it does inman, the edges draw together, theepithelium proliferates, scar tissue isformed, which eventually, either in partor in whole, is absorbed
. Journal of radiology . is vastly further in the scheme of evo-lution from peas to mice than it isfrom mice to man. Mice are mammalslike man; their structure is like mans—a head, a trunk, four limbs. Theirorgans are like mans, arranged in thesame relation to each other, made outof the same types of materials, func-tioning in the same way for the main-tenance of the organism. If we cut amouses arm it bleeds like mans, andthen regeneration sets in as it does inman, the edges draw together, theepithelium proliferates, scar tissue isformed, which eventually, either in partor in whole, is absorbed—a processidentical with that of mans tissues,functioning like those of a man, justas the geranium does if you cut The law of heredity, transmitsa type of protoplasmic behavior downthe full line of evolution; similar tis-sues function in the same way becausethey were derived from a commonancestry. If we do not accept this, wemust discard the theory of evolution,for this is the heart of the theory 454 INHERIT ABILITY OF SPOXTAXEOUS CANCER—SLYE \F-NDELIAN EXPLANATION CHART J J , L j i I I™ STRAIN 84 — BRJL— PART OF LINE I have here quoted somewhat atlength from my article now in pressand to appear shortly in the Journalof Cancer Research, because thesefundamental biologic facts cannot betoo often repeated. Indeed, it seemsto be one of the profoundest needs ofmedical science today that it shouldadjust itself to these fundamentalbiologic laws and base itself upon them;and it is one of the pre-eminent aims ofthe work of this laboratory to assist insetting biology in its relation to path-ology and to therapy. As already stated, the work of thislaboratory, carried on for twelve years,and during all that time yielding per-fectly consistent results, has shown thatthe cancer tendency and the non-cancertendency are some of the charactersthat go into the germ plasm and in-evitably come out in the offspring ofmice in exact accordance with the basiclaws of h
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