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(Irish grammar) A mutation of the initial sound of a word by which voiceless sounds become voiced, voiced stops become nasal consonants, and vowels acquire a prothetic nasal consonant: see Appendix:Irish mutations#Eclipsis.
The titles in the order adopted, but with date of publication, are as follows: "Oratio inauguralis," on his appointment (1649) as Savilian professor (1657); "Mathesis universalis, seu opus arithmeticum philologice et mathematice traditurn, arithmeticam numerosam et speciosam aliaque continens" (1657); "Adversus Meibomium, de proportionibus dialogus" (1657); "De sectionibus conicis nova methodo expositis" (1655); "Arithmetica infinitorum, sive nova methodus inquirendi in curvilineorum quadraturam aliaque difficiliora matheseos problemata" (1655); "Eclipsis solaris observatio Oxonii habita 2° Aug.
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