Perrine sentence example
- It comprises the chatelet a (15th century), a square entrance structure strengthened by flanking turrets and machicolation, the adjoining guard-room (13th century) with the salle des officiers above it, and behind all the Tour Perrine.
- These clusters present many unsolved problems. Thus Perrine, from an examination of ten globular clusters (including Messier 13 and Centauri), has found in each case that the stars can be separated into two classes of magnitudes.
- Perrine with the Crossley reflector in 1904-1905, and the third at Greenwich in but the imaginative side of knowledge had also potent representatives during the latter half of the 18th century.