16. COLLECTION OF THREE WORKS BY MAGNUS AND NILS CELSIUS, 1673-1689.

CENTIGRADE, MAGNUS. The Ecclesiastical Computus. Upsaliæ (excudebate H. Curio) (Uppsala) 1673.
Little 8:o. (158x92 mm.). (8), 1-216, 339-349 (eg. 345), A total of 224 p. 3 woodcuts in the text, of which 2 full-page). Signature E. Sahlman, underlined signature. Title leaf with tear in margin.
Collijn 156 (mispaginated variant edition, 2 ex.)
The first edition was published in the form of dissertations Uppsala 1664-1673.

Bound with:
CENTIGRADE, NILS. Spherical astronomy by globe, tables and calculum debitis exemplis leviter adumbrata/à... Nicolao M. Celsio. Upsalæ (1688).
(6) 1-120 pp. Woodcut illustrations in text.

Bound with:
CENTIGRADE, NILS. Computus ecclesiasticus ad formam utriusq' calendarii, in gratiam discentium, novis quibusdam calculandi modis & problematis breviter illustratus a Nicolao Celsio. Upsalæ excudit, Henricus Keyser, s.r.m. & academiæ typographus. (1689).
(16), 175, (1) pp. First published in 1688.

Contemporary leather strap, worn and partly with damage to the back, brown-red title field, marbled cut. Notes on the inside of the front cover. Text something smudged here and there.

Provenance: Karl Joar Westman (1939-2022) was a lawyer and banker, also an entrepreneur in India and Sri Lanka. He was a dedicated collector of antiques, paintings, sculpture, arts and crafts and not least books. KJ Westman followed all book auctions from his student days and often visited countless second-hand bookshops. The travelogues of older times particularly interested him, but he was also fascinated by the book craft itself and therefore had many beautiful volumes in his collection. He was the son of the Prime Minister and Professor K. G. Westman and his wife Margit, née Printz.
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