Professor Baker, of the department of physics in the University of Pennsylvania, has prepared this book to cover the work usually taken in the advanced courses in physics in the leading universities and technological institutes.

Honorary degree ceremonies were notoriously rowdy occasions, with students packing the gallery to heckle the dignitaries below; on this occasion students suspended the figure of a Dervish above the heads of the assembled academics and their guests while spraying them with water from a hose. Kitchener himself seemed more amused than offended by the rowdiness until it began to detract too much from the solemnity of the occasion, when his "smile grew fainter, and ultimately vanished as the interruptions continued." He submitted with a good grace to having his horses unhitched and his open carriage pulled through the streets by the undergraduates, but there was general disapproval of attempts to break into the Vice Chancellor's garden while he was entertaining the Sirdar to lunch and into an evening function at Christ's College, where Kitchener was staying. The day was marred by an unfortunate incident in which the press of the crowd outside the Senate House caused the railings to collapse, injuring some people quite badly.

... a general scramble to get upon the railings ostensibly for a good view of the Sirdar ensued. Some of the bolder spirits among the undergraduates attempted to climb over ... Just as the Sirdar's carriage was moving off, the mouldings of the railings with a loud crack gave way. Instantly everyone clinging to them jumped down, and those persons in the near vicinity quickly moved away. Hardly had the last person reached the ground ere over sixty yards of the iron palings began to fall. Involuntarily every person within reach grasped them, with the result that the force was broken. So great was the number of people underneath that by much exertion they were enable to safely lower the ponderous weight of iron that threatened to crush them, but a few persons were hurt, one or two badly... Mr H Havelock, of St John's, fared very badly. He fell under the stonework and railings. His injuries are not exactly known, but it is feared that he was badly crushed.

At the annual Fellowship Election on November 2, Mr Thomas Henry Havelock (B.A. 1900), fifteenth wrangler 1900; First Class, Division 2, Mathematical Tripos, Part II, 1901; Smith's Prizeman 1902; Isaac Newton (University) Student 1902; was elected to a Fellowship. Mr Havelock submitted dissertations entitled: (1) On the continuous spectrum; (2) On the pressure of radiation; (3) On the general equations of wave propagation.

At a Convocation of the University of Durham, held on June 27, the degree of Doctor of Civil Law, honoris causa, was conferred on Dr Donald MacAlister, Fellow of the College, and the degree of Doctor of Science on Mr T H Havelock, Fellow of the College.

Mr T H Havelock (B.A. 1900), Fellow of the College, has been appointed Assistant Lecturer in Mathematics at the Armstrong College, Newcastle-on-Tyne.

Mr T H Havelock (B.A. 1900), formerly Fellow of the College, elected to the Royal Society.

I first knew him when I joined the staff of Armstrong College in 1922 as a junior lecturer. Then, as always, Havelock had a somewhat formal, even austere, outward demeanour. But in his quiet way he was completely sociable. He regularly attended the coffee-sessions in the small underground staff tea-room, not saying much but showing by a twinkle in his eye that he enjoyed the normally frivolous talk and chaff of the junior members. Quite early on I realised his physical disability, when a roof-light in the tea-room broke and fell with a bang and a flash. Havelock fainted, recovering consciousness quickly but so white-faced and shaken that he had to be taken home.

In appearance Havelock was bald, rather slightly built, gentle in voice and movement. He did not "lecture" in the usual sense of the word, but stood at the end of the lecture bench and talked, occasionally moving up to the blackboard. He never used a note, whatever the topic. Havelock was well organised, quietly logical in speech and in his blackboard work, undemonstrative and completely free from any sign of pomp or showmanship. Only when something came out well, a proof, the solution of a problem, some new insight, would he show his feelings and then smile quite charmingly. His style contrasted sharply with that of his distinguished colleague Goldsbrough, who had a rather fussy and bustling manner. Havelock impressed by his thoroughness and his devotion to his subject. He had the knack of making things seem obvious and simple. Indeed, I still remember after forty years his proof of the 46° angle bow wave made by a ship as the interference pattern of the waves produced by a point intermittently breaking the surface of the water as it moves forward.

Havelock's scientific work lay in two main areas: the passage of light through materials and naval hydrodynamics. Although he wrote some twenty papers on the first of these, they did not attract lasting attention, and Havelock himself appears to have lost interest in optics by 1930. He did, however, do pioneering work on the wave resistance of ships and related problems, topics which interested him into his eighties. His most significant contributions started in 1923 after he had discovered a much neglected, but fundamental, paper by J H Michell (1898). In following years he applied and generalised its methods with conspicuous success. He discovered much about the way a ship's resistance to motion depends on the form of its hull. Later in his life he answered sophisticated questions about the trim and the heaving and pitching of a ship. He constantly compared his theory with experiment, and sought to improve the extent of the agreement between the two.

In his opening address to the international seminar on theoretical wave- resistance held at Ann Arbor, Michigan, Georg Weinblum remarked that "The principal trends in the development of our subject could be followed until recently by studying Havelock's work." This is nothing more than a simple statement of fact. One has only to refer to a book, such as that written by Kostyukov (1968), or to the proceedings of a conference, such as that mentioned above, to appreciate that Havelock stood at the very heart of the subject, and has left an imperishable legacy behind him. His work in naval architecture, unlike his studies on the propagation of light, made significant demands in mathematical analysis; demands which he was seldom unable to meet. This, in combination with an enviable physical intuition, an admirable thoroughness, and an impressive single-mindedness led to scientific papers which are object lessons to all who came after him.

The interests of the Office of Naval Research in arranging for the publication of the collected hydrodynamical papers of Sir Thomas Havelock have a dual nature. First, we take great pleasure at this opportunity to express our respect and admiration for Sir Thomas, whose intellectual and scientific achievements in hydrodynamics have served as a source of inspiration and guidance for those researchers following him. Second, we feel that the increased accessibility of these important contributions of Sir Thomas which bear directly on many of today's urgent problems will prove to be of great value to the hydrodynamic research community.

The editor was very honoured and delighted to receive the invitation of the Office of Naval Research to edit the collected edition of Sir Thomas Havelock's hydrodynamical papers. Since the first introduction of hydrodynamical research many years ago, the editor has always regarded Professor Havelock's work with the greatest admiration and respect. And, for nearly forty years, after making personal acquaintance with Professor Havelock, the editor has received much very kind advice and assistance from him, which he is very glad to acknowledge here.