26 November, 1889. SIR JOHN COODE, K.C.M.G., President, in the Chair. The discussion on the Paper by Mr. J. I. Thornycroft, on "Water-Tube Steam-Boilers for Marine Engines," occupied the evening. 3 December, 1889. SIR JOHN COODE, K.C.M.G., President, The following Associate Members have been transferred to the class of EDWARD ALVIN AMPHLETT, B.E. GERALD WINZAR BENNETT. ERNEST NEWTON BOWDEN. THOMAS COPLEY CALVERT. FRANK CARTWRIGHT. ALBERT HENRY CLAYPOOLE. FRANCIS AUGUSTINE COGHLAN. WALTER ROBINSON CRABTREE, B.Sc. Students. HERBERT LELAND CROSTHWAIT, B.A., B.E. ROBERT BLAND DIXON. HENRY WILLIAM DUDIN. JOHN ALFRED EDMONDSON. HARRY HORNE ELLIOTT. CONRAD KRAUSS FALKENSTEIN. THOMAS FARQUHARSON, B.Sc. CLINTON COLERIDGE FARR, B.Sc. PERCY HAWKINS. EDMUND LEWIN HILL. HARRY JAMES HILLS. STANLEY PAGE HUTTON. FREDERICK ALEXANDER JAMIESON. DANIEL JENKINS. PETER WHITE JOHNSON. CHARLES HARVEY KILBY, Wh.Sc. PERCY FRANCIS LAPWORTH. WILLIAM THEODORE LUCY. CECIL CARY MARKHAM. GEORGE ACHILLES MEURICOFFRE, B.A. ARTHUR OLIVER NICOLLS. FREDERICK CHARLES PRESTON. PERCIVAL ARTHUR LEONARD PRYOR B.A. FRANK PAUL REYNOLDS, A.K.C. CECIL GRAHAM SCOTT. Associate Members-continued. THOMAS WAGHORN ELFORD HIGGENS. GEORGE HODGKINSON. SAMUEL JICKELL. HECTOR KIDD. WILLIAM THOMAS LANCASHIRE, Stud. WILLIAM JOSEPH COSENS LANCASTER. JOHN HARRY LEWIS, Stud. Inst. C.E. DANIEL EDWARD RICHARDSON LUCAS. FREDERIC WILLIAM MACAULAY, Stud. Inst. C.E. THOMAS KENNETH MACKENZIE, Wh.Sc. CHARLES WILLIAM MACLEAN. THOMAS MCMAKING. FRANCIS MAYALL MALLALIEU. ALFREDO HENRIQUE PACHECO. FRANCIS ADOLPHUS PAWLEY, Stud. Inst. C.E. ARNOLD HENRY PERRY. JOHN PLATT, Stud. Inst. C.E. EDWARD PETER POPKISS. Associate. GEORGE ALFRED BARNETT, C.I.E. The discussion on the Paper by Mr. J. I. Thornycroft, on "Water-Tube Steam-Boilers for Marine Engines," occupied the evening. 10 December, 1889. SIR JOHN COODE, K.C.M.G., President, in the Chair. (Paper No. 2407.) "On the Triple-Expansion Engines and Engine-Trials at the Whitworth Engineering Laboratory, Owens College, Manchester." By PROFESSOR OSBORNE REYNOLDS, LL.D., F.R.S., M. Inst. C.E. In designing steam-engines to take their place amongst the appliances of an engineering laboratory, at the present stage of the development of these institutions, many considerations present themselves. The primary purpose of the engines is to afford the students opportunities of practice in making the various measurements involved in steam-engine-trials, and to afford them an insight into the action of steam in the engine, as well as of the mechanical actions; also to render them familiar with good examples in steamengine design. Another purpose, however, which it is very desirable such engines should serve, is that of supplying a means of research by which knowledge of the steam-engine may be extended. A systematic and experimental investigation of the steam-engine involves two sets of conditions which, unless it be in a laboratory, can hardly exist together, namely, the time and attention of the scientific investigator, and the assistance of a considerable number of trained observers. In the engineering laboratory these conditions should exist; the first being supplied by the permanent staff, and the second by the students as their training advances. The making and repeating of the individual observations involved in a scientific engine-trial, as well as reducing the results, demands an amount of patience and perseverance which is severe on one so young and inexperienced as a student; but the importance and reality which the research adds to all the detail of the work, as well as the complete attention and overlooking which it ensures from those responsible, constitute very great advantages. |