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Basis astronomiae sive astronomiae pars mechanica in qva describuntur observatoria, atqve instrumenta astronomica Roemeriana Danica; simulqve eorundem usus, sive Methodi observandi Roemerianae in usum publicum, & praesertim in gratium unà prodeuntis valde insignis atqve usûs amplissimi, nunqvam non posteris memorandi tridui observationum Tusculanarum Roemeri / ex fundamentis exponuntur a Petro Horrebowio. [Programma in obitum Römeri]. Public Domain Mark. Source: Wellcome Collection.