itsself

pron

1. (obsolete)Synonym of itself.

   “Q. 290. But does this calculation confine itsself to the length of the day, that is to say: from day-break untill growing of night? / A. No, the time stipulated in the different regions — and as we find it in various works,.— confines itsself solely to the rising- and setting of the Sun; while the day, — if we suppose this to be from the dawn-of-day until the dusk-of-night, — is longer.”