| Show Prostrets of Astronomical Photography Professor Holden gives an interesting account of the photographic apparatus and the work done in astronomical photography photog-raphy at the Lick observatory lie states that the negatives taken there bear easily an enlaruemect of 570 diameters and even double that amount Fom an examination examina-tion of the best pictures yet taken at the observatory Professor Holden finds that parallel walls on the moons surface whose tops are no more than 200 yards or so in width and which are not more than 1000 or 1200 yards apart are plainly visible There is no doubt that enlarged photographs photo-graphs arc capable of affording more information in-formation regarding the moons surface than can be gained by years of diligent observation ob-servation and when the larger lenses now found necessary are brought into use marvelous mar-velous strides in this direction may be looked for Oiiw York Commercial Advertiser Ad-vertiser |