to which the adhering body in this country is the Royal Society;
it is a pleasing duty to record thanks to Sir Harold Hartley,
chairman of the British National Committee, and to Professor
Vasco Ronchi and Dr. René Taton, president and secretary-
general respectively of the International Union, for their
co-operation in the final stages of planning. I should also like
to record my thanks to all those who in Oxford assisted with
many different details of organization, in particular to my
colleague Mr. H. R. Harré; to Mrs. Sylvia Selby and Mrs.
Dorothy McLean, successively my secretary, who efficiently
took over a large part of the routine of organization; to Mrs.
Mary Holdsworth and Mr. J. E. Wall for their assistance with
the Russian contributions; to Mrs. J. A. Z. Gardiner and
Mrs. G. Kitchin for their assistance in translating the contri-
butions in French and to Mr. H. Lawson and Mrs. L. Minio-
Paluello for those in Italian; and to Mr. P. C. Masters of
Hunts Ltd. for his very helpful co-operation in lithoprinting
the papers for circulation not only with speed but also with
elegance.

I am sure I speak for all members of the Symposium in record-
ing thanks to those who helped to make known the richness of
Oxford itself in historical scientific materials, in particular to
Dr. John R. Baker for arranging a special exhibition of micro-
scopes in the Museum of the History of Science, to Dr. Richard
Hunt for arranging a special exhibition of early scientific
books and manuscripts in the Bodleian Library, and to the
librarians of Merton, Queen's and Corpus Christi Colleges and
of Christ Church for showing examples of the scientific works
in their collections.

Finally, I should like to thank Dr. M. A. Hoskin and Messrs.
R. M. E. Williamson, A. Savile and D. M. Knight for reading
the proofs, Professor D. Hawkes for checking the transliterations
from Chinese, and Dr. S. Stern for checking those from Arabic.

A. C. CROMBIE
Director of the Symposium

All quotations have been placed between double inverted commas and quotations
within quotations between single inverted commas. Technical and archaic terms
and phrases which are not quotations have been placed between single inverted
commas.

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