Bruce proper motion survey; the general catalogue.

Mode of access: Internet.

Contributions to astronomy and geodesy, forming part of vol. xx of the Memoirs of the Royal astronomical society /

Mode of access: Internet.

Les etoiles : essai d'astronomie siderale /

Mode of access: Internet.

Meteorological observations.

Includes appendix to 1903.

Risposte piacevoli e curiose /

Signatures: ², A-2K⁴, a-d⁴.

De occultatione stellarum fixarum per lunam ...

Diss.

Der spektroskopische doppelstern Capella ...

Mode of access: Internet.

Die veranderlichen Sterne.

Mode of access: Internet.