Dissertatio mathematica de maculis solaribus praecipue iis quae ann. MDCCVIII et MDCCIX apparuerunt [microform] : nec non de methodo easdem observandi / praeside ... Christ. VVagnero ... eruditorum examini submittet Joh. Behrenhardus VVideburgus
Dissertatio mathematica de maculis solaribus praecipue iis quae anno septemdecimcentum et octo et septemdecimcentum et novem apparuerunt
Note
History of the observations of sun spots (including those at the Peking observatory), theories on their nature & cause; engraving illustrates movement of sun spots.
Reproduction Note
Microfilm. New Haven : Research Publications, 1973. 35 mm. (German baroque literature, Harold Jantz collection ; no. 2705, reel 543)