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Observations on the signs of the times and certain errors in modern systems of religious sects

George M'Cann

Observations on the structure, oeconomy, and diseases of the foot of the horse, and on the principles and practice of shoeing

Edward Coleman

Observations on the temperature of man and other animals

John Davy

Observations on the theological mystery, the harmonial philosophy, and spirit rappings

William Sheldon

Observations relative to the fossil elk of the Isle of Mann

H. R. Oswald

Observations upon Anthroposophia theomagica, and Anima magica abscondita

Henry More

Observations upon Mr. Johnson's remarks, upon Dr. Sherlock's book of non-resistance

William Sherlock

Observations upon Mr. Wadsworth's book of the souls immortality

Henry Layton

Observations upon a short treatise, written by Mr. Timothy Manlove

Henry Layton, Thomas Hollis

Observations upon a short treatise, written by Mr. Timothy Manlove, intituled, The immortality of the soul asserted

Henry Layton

Observations upon some of his Majesties late answers and expresses

Henry Parker

Observations upon the lactucarium of Auvergne : or "the milky juice of lactuca" ...

E. Fougera & Co

Observations, intended to point out the application of a prophecy in the eleventh chapter of Daniel

Spencer Perceval

Occult

R. Walker Lawrence

Occult physick, or The three principles in nature anatomized by a philosophical opperation [sic]

W. W

Occult revelations, in prose and verse

A. Frederick Tindall

Occult science

Harry Houdini

Occult science in India and amoung the ancients, with an account of their mystic initiations and the history of spiritism

Louis Jacolliot

Occultations and eclipses observed at Dorchester and Cambridge, Massachusetts

William Cranch Bond

Occultations and eclipses, observed at Dorchester, Massachusetts

William Cranch Bond

Occultations of planets and stars by the moon, during the year 1853

Smithsonian Institution