51-53.) - H. C.]

[1] Besides the works quoted in the text I have only been able to consult Gaubil's notices, as abstracted in Lalande; and the Introductory Remarks to Mr. J. Williams's Observations of Comets ...

Extracted from the Chinese Annals, London, 1871.

[2] Pinnula. The French pinnule is properly a sight-vane at the end of a traversing bar. The transverse lines imply that minutes were read by the system of our diagonal scales; and these I understand to have been subdivided still further by aid of a divided edge attached to the sight-vane; qu. a Vernier?

[3] Verbiest himself speaks of the displaced instruments thus ... "ut nova instrumenta astronomica facienda mihi imponeret, quae scilicet more Europaeo affabre facta, et in specula Astroptica Pekinensi collocata, aeternam Imperii Tartarici memoriam apud posteritatem servarent, prioribus instrumentis Sinicis rudioris Minervae, quae jam a trecentis proxime annis speculam occupabant, inde amotis. Imperator statim annuit illorum postulatis. et totius rei curam, publico diplomate mihi imposuit. Ego itaque intra quadriennis spatium sex diversi generis instrumenta confeci." This is from an account of the Observatory written by Verbiest himself, and printed at Peking in 1668 (Liber Organicus Astronomiae Europaeae apud Sinas Restitutae, etc.). My friend Mr. D. Hanbury made the extract from a copy of this rare book in the London Institution Library. An enlarged edition was published in Europe. (Dillingen, 1687.)

[4] On the contrary, he considered the photographs interesting, as showing to how late a period the art of fine casting had endured.

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