. Journal of roentgenology . such a specimen of a cord almostshingled over by glistening white scales, which all observersspoke of as limy deposits. To prove whether the scalesreally contained lime I made several radiograms of thespecimen. (Fig. 11.) It will be readily seen that lime isentirely absent when the radiogram is compared with thedirect photograph of the specimen (Fig. 12). Chemicaltest of the scales proved them to be entirely combustible,leaving no ash, as would have been the case had there beenany appreciable content of lime present. The scales werereally horny in structure and gav

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. Journal of roentgenology . such a specimen of a cord almostshingled over by glistening white scales, which all observersspoke of as limy deposits. To prove whether the scalesreally contained lime I made several radiograms of thespecimen. (Fig. 11.) It will be readily seen that lime isentirely absent when the radiogram is compared with thedirect photograph of the specimen (Fig. 12). Chemicaltest of the scales proved them to be entirely combustible,leaving no ash, as would have been the case had there beenany appreciable content of lime present. The scales werereally horny in structure and gave the chemical tests forkeratin, and should be classed as neurokeratin. Fig. 1. Operated. Kidney showing lime spicules and concentric deposits aboutpus cavities in the Cortex. These are of the replacement type, mummified deadcells being replaced by lime salts. These are not Kidney stones though theymay possibly become nuclei about which true Kidney stones may be formed byconcentric deposits. ]22 THE JOURNAL OF ROENTGENOLOGY. Fig. 3. Operated Goiter. Malignant and of Endotheloma type. The limespicules are of the replacement type as in Fig. 1. KERR — CALCIFICATIONS !•_>:;

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