Whether the small observatory has really become its equipment put in usable condition should be uncertain.
In any case, no results of Hedraeus' observational activities are known.
The astronomers of the following period in Uppsala,
including Anders Spole (professor 1679 - 99),
who has been described as 'the university's supplying scientific astronomer',
must also have been engaged in astronomical observations. Spole had previously for a few years (1667 - 1676)
been a professor in Lund and there on the roof of his house set up a small observatory, which, according to what Professor Lundmark made me aware of,
can be identified on Erik Dahlberg's battle plans over the battle of Lund 1676. It must have burned down already in the latter year.
Also in Uppsala, Spole had a small private observatory in his house, which was located at the corner of Svartbäcks- and Klostergatorna and which burned down by the great fire in 1702.
Nor are the results of Spole's observations preserved.
Distrustful of his modest instrumental aids, he is said by conscientiousness not to have wanted to publish the works performed with them.
Apart from the now mentioned insignificant approaches, we can say that it was not until well into the 18th century that Sweden got its first public astronomical observatory.
In 1730, Anders Celcius, only 28 years old, was appointed professor of astronomy in Uppsala.
He did his job to get the university a real observatory. There were probably some instruments:
astrolabees, sextants, quadrants, telescopes and observation clocks.
But they were kept in the university library, and because of the impossibility of setting them up properly,
astronomical observations could only be made with great difficulty.