ment performed by him. By this method each student is able to verify for himself in the laboratory, the truth of the principle stated to him in the class room. Each student will be required to submit an organization and a list of the machinery equipment, for several different sizes of mills, making different classes of products. In all the divisions of this department, the lecture work, so far as is necessary, will be illustrated with drawings and lantern slides. Carding and Spinning Professor Beaty Instructor Parker 400. Raw Material JUNIOR CLASS; COURSE VI. That the manipulation of cotton fibres may be carried out successfully, under various conditions, it is essential that the characteristics peculiar to the cotton fibre should be understood. Therefore, the introductory work of the students of this department is to examine the physical properties of cotton fibres, to ascertain their lengths of staple, spinning qualities, color, harshness and softness, and to determine their suitability for making various kinds of yarns, filling, warp, ply yarns, etc. This study of fibres will not be limited to American cottons, but will include the more important commercial cottons of the world. The effects of temperature and humidity on fibres will be fully discussed. Also the handling of cotton, prior to manufacturing processes, together with the injury to cotton fibres therefrom. 401. Opening and Mixing JUNIOR CLASS; COURSE VI. Beneficial effects of opening and airing cotton; length of time to air for best results; effects on resultant yarn if not properly opened; necessity of mixing; when to mix cottons and methods of carrying out same; effects of improper mixing; effects of a judicial mixing on the after processes of manufacture; reasons for blending; effects of blending cottons on the resultant yarn, for strength, appearance, cost, etc.; effects on finished products if cottons are not properly mixed or blended. 402. Picker Room JUNIOR CLASS; COURSE VI. Proper situation of picker room; arrangement of machinery in same; automatic feeder; purpose for which used; construction, adjustment of parts, etc.; action on cotton; manner of connecting them to breaker lappers with and without dust trunks; advantages of dust trunk; facilitating good results by proper care; breaker lapper, use, explanation of parts, beaters used, adjustment of working parts and experimenting with different speeds of beater; intermediate and finisher lappers, necessity of using same, construction, speeds, care of beaters, kinds of beaters, speeds of beaters for different lengths of staple; evener motion and its control of feed rolls; adjustment of grids to regulate amount of waste, disposition of waste; regulation of air current; effects of air current on proper working of the lapper; lap formation; calculation on above machines for drafts, length of lap, etc. 403. Carding JUNIOR CLASS; COURSE VI. Purpose of carding; principle upon which cards are built; comparison of types of cards; explanation of purpose and construction of feed plate, licker-in, cylinder, flats, screens, doffer, coiler head, etc.; different settings of card to produce best results on different lengths and qualities of fibre; regulation of waste; amount of draft; grinding; effects of improper grinding on card clothing and fibre; calculations for changing gears and speeds of various working parts. 404. Railway Heads and Drawing Frames JUNIOR CLASS; COURSE VI. Purpose, use, construction, advantages and disadvantages of railway heads; explanation of stop motions, evener; principle of drawing slivers; purpose of drawing frame; comparing work of leather covered and metallic rolls; adjustment of rolls; distribution of draft between the rolls; speeds, stop motions; all calculations on above machines, drafts, production, etc. 405. Fly Frames SENIOR CLASS; COURSE VI. Slubber, intermediate, fine roving and jack frames; construction, care and operation of the modern fly frame; bobbin and flyer lead machines; advantages of the bobbin lead; detailed explanation of working parts, differential motion, horse head, builder, full bobbin stop motion, etc.; adjustment of drawing rolls; calculations for draft, twist, lay, tension and other gears. 406. Yarn Manipulation SENIOR CLASS; COURSE VI. In this branch of work is included twisting; reeling; bundling; spooling; beaming. The slasher, construction and use; necessity for sizing; creels, cylinders, size boxes, etc.; mixing of size; different sizing ingredients for special purposes; method of preparing warps for the slasher; various calculations regarding each of the above processes. 407. Combing SENIOR CLASS; COURSE VI. Sliver lap machine, its construction, use, etc.; care and operation; leather covered rolls; metallic rolls; ribbon lap machine; its construction, use, etc.; advantages of using same; care and operation; lap formation; combing machine, its use, care and operation; detailed explanation of working parts, cylinder, half laps, segments, detaching rolls, etc.; with rules for adjusting and timing same; regulation of waste made; necessity of the process; relation of the process to fine smooth yarns; practical experience in adjusting above machines; calculation for change gears, etc. 408. Spinning Frames SENIOR CLASS; COURSE VI. Construction of the modern ring spinning frames; purpose of ring spinning; discussion of its principal parts; rings and ring holders; various types of spindles in use; speed of spindles; weights, sizes and speeds of travellers; warp, filling and combination builder mo |