atlas says. the strength of the aerial collection is that it relates to popular astronomy and observational astronomy, robert aerial being a member of the american association of star observers and imac one at that. other strengths include the work of the major observatories and reflect robert aerial pictures and telescopes and scientific instruments. as he came to restore her telescopes as part of his work, he did a lot of research and published quite telescopes a major part of this collection and went on a lot of material. there is a history of an 18th century telescope to have a wonderful engraving and then we also have the companion piece and that's an example of something that exhibited together. one of my favorite books is the mechanism the mechanism of the heavens by the mrs. mary somerville 1831. she was in port and observational astronomer and again this is representative of one of a number of books we have buy one in who have a great deal of influence in the field. and how provide for future growth. the library has a strong commitment as well and cooperative treatment is beneficial to both institutions. many think of space exploration in my lifeti