A manual of spherical and practical astronomy : embracing the general problems of spherical astronomy, the special applications to nautical astronomy and the theory and use of fixed and portable astronomical instruments /

Mode of access: Internet.

A manual of spherical and practical astronomy : embracing the general problems of spherical astronomy, the special applications to nautical astronomy, and the theory and use of fixed and portable astronomical instruments, with an appendix on the method of least squares.

Mode of access: Internet.

A manual of spherical and practical astronomy, embracing the general problems of spherical astronomy, the special applications to nautical astronomy, and the theory and use of fixed and portable astronomical instruments,

Mode of access: Internet.

A manual of spherical and practical astronomy : embracing the general problems of spherical astronomy, the special applications to nautical astronomy, and the theory and use of fixed and portable astronomical instruments, with an appendix on the method of least squares.

Mode of access: Internet.

An introduction to spherical and practical astronomy /

Mode of access: Internet.

The elements of practical astronomy,

Mode of access: Internet.

Astronomy. Determination of time, longitude, latitude, and azimuth

Mode of access: Internet.

An introduction to practical astronomy : with a collection of astromical tables /

"Catalogue of astronomical instruments by several different makers, with their prices": p. [497]-505.

Practical astronomy,

Mode of access: Internet.

Lehrbuch der sphärischen astronomie,

Mode of access: Internet.

Astronomie sphérique; notes sur le cours professé pendant l'année 1887,

Available on demand as hard copy or computer file from Cornell University Library.

Traite de la Sphère.

Traité du Calendrier.

Traité de la sphère et du calendrier;

Plate 1 wanting.

Images inside a reflecting spherical surface with possible application in astronomy

This report studies an algebraic equation whose solution gives the image system of a source of light as seen by an observer inside a reflecting spherical surface. The equation is looked at numerically using GeoGebra. Under the hypothesis that our galaxy is enveloped by a reflecting interface this becomes a possible model for many mysterious extra galactic observations.

Elements of plane and spherical trigonometry, with its applications to the principles of navigation and nautical astronomy. With the logarithmic and trigonometrical tables.

Mode of access: Internet.