The meeting of the Association was to be held in Oxford, the bed-rock of classical learning--the only place, it seems, where the word "humanism" in its narrow sense still survives in modern university terminology as that part of the curriculum known as _Litteræ Humaniores_. As was characteristic of his methods, the mere address itself did not suffice, but he prepared for the occasion in other ways. Thus he collected from the various Oxford colleges and placed on exhibition an array of historical objects illustrating the important part Oxford had once played in science and natural philosophy in days antedating the Royal Society which had its seeds of origin there. In addition, and as a possible offset to this, he exhibited from his own collection of books those volumes which constituted in their original editions the outstanding classics in Science and Medicine. A small pamphlet concerning them reads as follows: Faced with a bewildering variety and ever-increasing literature, how is the hard-pressed student to learn-- 1. The evolution of knowledge in any subject; 2. The life and work of the men who made the original contributions? So far as concerns Science and Medicine, an attempt is made to answer the question by the collection of a Bibliotheca Prima, examples from which are here shown. The idea is to have in a comparatively small number of works the essential literature grouped about the men of the first rank, arranged in chronological order. I have put out the _editiones principes_ of twenty of such works. The fundamental contribution may be represented by a great Aldine edition, _e.g._ Aristotle, by the brief communication such as that of Darwin and Wallace in the Proceedings of the Linnean Society, 1858, or by a three-page pamphlet of Roentgen. From the card lists of Galen, Hippocrates, Vesalius, and Harvey, those interested will see the aim and scope of the collection. The works on exhibition are: Plato 1513 Hippocrates 1526 Aristotle 1495-98 Theophrastus 1483 Galen 1525 Dioscorides 1499 Celsus 1478 Plotinus 1492 Rhazes 1476 Avicenna 1486 (not ed. pr.) Averrhoes 1473 Copernicus 1543 Vesalius 1543 Agricola 1556 Gilbert 1600 Bacon 1620 Galileo 1632 Harvey 1628 Descartes 1637 Newton 1687 Though it is hardly pertinent to this introductory note, the temptation is strong to dwell further on the treasures of his library. These mentioned above were but samples from the Bibliotheca Prima, and the superb collection, with copious notes on each separate item, is further subdivided into some seven sections--Bibliotheca Secunda, historica, biographica, literaria, the incunabulas, and so on.