Abstract
1. The nucleic acid contents of incomplete virus and complete virus (PR8 strain) were compared by U. V. absorption and color reaction measurements. (Orcinol-Hcl reaction and Diphenylamine reaction)
2. It was found, as judged by ultraviolet absorption measurement, that the complete virus contains about 3 times of ribonucleic acid compared with incomplete virus. (0.94%: 0.3%) Meanwhile, tests for pentose (Orcinol-Hcl reaction) indicated that the complete virus contains about 1.5 times of ribonucleic acid compared with incomplete virus. (2.7%:1.6%)
3. From these results, the reason of considerable disagreement existed in the literature concerning the nucleic acid content of influenza virus was discussed
