Show back to nature astronomers turn to the spider for one of the most necessary accessories cess ories ories of their meridian telescopes for fine cross hairs t to 0 stretch across the field of the telescope and mark the central line by which the passage of stars is to be gauged there is nothing to excel a strand from a spiders web says a writer in co coronet ronet even ake the unpopular housefly may furnish a serviceable part for a research instrument an astronomer found a flys wing useful in the construction of a delicate device for measuring the heat of remote stars |