Word: pertains
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...time" has been introduced and some new instruments have been invented to aid in astronomical research. Another book of Obervatory Annals and many small treatises have been published. These cover the work of the whole year and are of much value in that branch of science to which they pertain...
...thanks of the class are due to Mr. Nichols for the careful and conscientious manner in which he has performed the various duties that pertain to his office...