APPLICATION OF MATHEMATICS TO CHEMISTRY. 



69.9 



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Acetic Acid. 



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000 

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Isobutyric Acid. 



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I 



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 Unknown Third Term. 



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Formic acid ^ y is formally the first term of the series, although as the 



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formic ketone is unknown, we cannot directly prove the relation. 



It is, however, unnecessary to dwell longer on such series ; it is sufficient to 

 point out the probability of their existence, in order to show that a common 

 difference is not an essential character of successive functional series. 



VOL. XXIV. PART III. 



9d 



