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In order to investigate this phenomenon further, we obtained moderate resolution (R$\\sim$18,000) spectra of 27 RGB stars in NGC 288 with the Hydra multifiber spectrograph on the Blanco 4m telescope at Cerro Tololo Inter-American Observatory. From these data we derive iron ($\\langle$[Fe/H]$\\rangle$=-1.19; $\\sigma$=0.12), oxygen ($\\langle$[O/Fe]$\\rangle$=$+$0.25; $\\sigma$=0.13), and sodium ($\\langle$[Na/Fe]$\\rangle$=$+$0.15; $"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1406.5220","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-06-19T21:23:23Z","cross_cats_sorted":[],"title_canon_sha256":"7c1b3975704e7bb6796c74fbca6853853d8e1cae526befbababc2e151a1ff6b3","abstract_canon_sha256":"06262ccf7c60da85b1a69fc4fdfeb3889c971700f0d2a5cd57075fb726e7ba62"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:52.729094Z","signature_b64":"r6OzbiHba5/l95VxUw5ivx75x4aIWfvVI+y1dk7nsIxxE2TbcZNjwjGYe2BZCk/jjVwRdQJw5fBk6PFu9kunAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8ce66f6c1762fb3aa46a795e96e90b1f5cdf4248439c6284f5de578eada09d64","last_reissued_at":"2026-05-18T01:42:52.728487Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:52.728487Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Light Element Chemistry and the Double Red Giant Branch in the Galactic Globular Cluster NGC 288","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Christian I. 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