§ 124_b_. The Geneva Convention comes into force for each contracting Power six months after the date of the deposit of its ratification (article 30). The new Geneva Convention replaces the old of 1864, but the old Geneva Convention remains in force between such of its contracting parties as do not become parties to the new Convention of 1906 (article 31). Such of the Powers as signed the old Convention of 1864, but did not sign the new Convention of December 31, 1906, are free to accede to it at any time later by means of a written notification to the Swiss Federal Council. Other Powers may likewise notify their accession at any time to the Swiss Federal Council, but their accession only takes effect in case, within a period of one year from such notification, no objection to the accession reaches the Swiss Federal Council from any of the previous contracting Powers (article 32). Each of the contracting Powers is at liberty at any time to denounce the Geneva Convention by a written notification to the Swiss Federal Council, which must immediately indicate it to all the other contracting Powers (article 33). The denunciation, however, does not take effect until one year after it has come to the notice of the Swiss Federal Council, and a denunciation only affects such Power as has notified it. IV CAPTIVITY Grotius, III. c. 14--Bynkershoek, _Quaest. jur. publ._ I. c. 3--Vattel, III. §§ 148-154--Hall, §§ 131-134--Westlake, II. pp. 63-68--Lawrence, § 164--Maine, pp. 160-167--Manning, pp. 210-222--Phillimore, III. § 95--Twiss, II. § 177--Halleck, II. pp. 19-30--Taylor, §§ 519-524--Moore, VII. §§ 1127-1133--Wharton, III. §§ 348-348D--Wheaton, § 344--Bluntschli, §§ 593-626--Heffter, §§ 127-129--Lueder in Holtzendorff, IV. pp. 423-445--Ullmann, § 177--Bonfils, Nos. 1119-1140--Despagnet, Nos. 544-550--Pradier-Fodéré, VII. Nos. 2796-2842, and VIII. No. 3208--Rivier, II. pp. 273-279--Nys, III. pp. 537-553--Calvo, IV. §§ 2133-2157--Fiore, III. Nos. 1355-1362, and Code, Nos. 1567-1588--Martens, II. § 113--Longuet, §§ 77-83--Mérignhac, pp. 87-113--Pillet, pp. 145-164--_Kriegsbrauch_, pp. 11-18--Zorn, pp. 73-123--Bordwell, pp. 237-248--_Land Warfare_, §§ 54-116--Spaight, pp. 260-320--Holland, _War_, Nos. 24-40--Eichelmann, _Über die Kriegsgefangenschaft_ (1878)--Romberg, _Des belligérants et des prisonniers de guerre_ (1894)--Triepel, _Die neuesten Fortschritte auf dem Gebiet des Kriegsrechts_ (1894), pp. 41-55--Holls, _The Peace Conference at the Hague_ (1900), pp. 145-151--Cros, _Condition et traitement des prisonniers de guerre_ (1900)--Beinhauer, _Die Kriegsgefangenschaft_ (1910)--Payrat, _Le prisonnier de guerre dans la guerre continentale_ (1910). [Sidenote: Development of International Law regarding Captivity.]