_Metrologicorum Scriptorum Reliquiae_ (2d vol., _Scriptores Romani_). Edited by F. Hultsch, Leipzig, 1866. Orosius. _Historiarum adversus paganos libri VII._ Edited by Zangemeister, Leipzig, 1889. _Physiologus._ Greek version contained in Lauchert’s _Geschichte des Physiologus_. Strassburg, 1889. Plinius Secundus, Gaius. _Naturalis Historiae Libri XXXVII._ Edited by L. Janus, Leipzig, 1854–65. _Rhetores Latini Minores._ Edited by C. F. Halm, Leipzig, 1863. Tertullianus. _De Spectaculis_ in _Opera Omnia_, Migne, _P. L._, vol. i. II. SECONDARY WORKS Altamira, R. _Historia de España y de la civilización española._ 4 vols. Barcelona, 1900–11. Ball, W. W. R. _A Short Account of the History of Mathematics._ London, 1901. Baas, J. H. _Outlines of the History of Medicine and the Medical Profession._ Translated and, in conjunction with the author, revised and enlarged by H. E. Handerson. N. Y., 1889. Beazley, C. R. _The Dawn of Modern Geography: A History of Exploration and Geographical Science from the Conversion of the Roman Empire to A.D. 1420._ London, 1897–1906. Boissier, G. _Étude sur la vie et les ouvrages de M. Varron._ Paris, 1861. Boissier, G. _La Fin du paganisme; étude sur les dernières luttes religieuses en occident au 4ème siècle._ 2 vols. Paris, 1891. Bury, J. B. _History of the Later Roman Empire from Arcadius to Irene._ 2 vols. London, 1889–92. Cahier, C. _Physiologus_ (Latin version), Mélanges d’Archéologie (1851–53), Paris. Cajori, F. _A History of Elementary Mathematics._ New York, 1907. _Cambridge Medieval History_, planned by J. B. Bury, edited by H. M. Gwatkin and J. P. Whitney. Vol. 1. New York, 1911. Cañal, Carlos. _San Isidoro. Exposición de sus obras e indicaciones acerca de la influencia que han ejercido en la civilización española._ Sevilla, 1897. Cantor, M. _Die Römischen Agrimensoren und ihre Stellung in der Geschichte der Feldmesskunst._ Leipzig, 1875. Cantor, M. _Vorlesungen über Geschichte der Mathematik._ 3 vols. Leipzig, 1894–1900. Chaignet, A. E. _La Rhétorique et son histoire._ Paris, 1888. Christ, W. _Geschichte der Griechischen Literatur._ München, 1905. Müller’s _Handbuch der Altertumswissenschaft_. Conrat, M. _Geschichte der Quellen und Literatur des Römischen Rechts im früheren Mittelalter._ Leipzig, 1891. Conrat, M. _Die Epitome Exactis Regibus._ Berlin, 1884. Coussemaker, E. de. _Histoire de l’harmonie au Moyen Age._ Paris, 1852. Cumont, F. _Les Religions orientales dans la paganisme romaine._ Paris, 1906. Cuvier, G. L. C. F. D. _Histoire des sciences naturelles chez tous les peuples connus._ Paris, 1841–45. Delambre, J. B. J. _Histoire de l’astronomie ancienne._ 2 vols. Paris, 1817. Delambre, J. B. J. _Histoire de l’astronomie du moyen âge._ Paris, 1819. Dill, S. _Roman Society in the Last Century of the Western Empire._ 2d ed. London, 1899.