. Textile school catalog, 1916-1917 . of the scope of the subject: 52 REGULAR COURSE—SECOND YEAR WOOL SELECTING AND GRADING The wool fibre.—Distiuctiuu between wool and hair.——Nature.—Elasticity.—Trueness of breeding.—Strength.—Softness.—Fineness and length.—Color.—Felting properties.—Wools of different countries.—Comparison ofvarious American wools.—Cashmere.—Alpaca.—Mohair.—Points to be lookedfor when purchasing wool.—Explanation of the term Fleece Wool.—Gradingof the fleece. Note.—Wool scouring and drying considered under Chemistry and Dyeing. WOOLEN YARNS Preparatory Processes.—Bur
. Textile school catalog, 1916-1917 . of the scope of the subject: 52 REGULAR COURSE—SECOND YEAR WOOL SELECTING AND GRADING The wool fibre.—Distiuctiuu between wool and hair.——Nature.—Elasticity.—Trueness of breeding.—Strength.—Softness.—Fineness and length.—Color.—Felting properties.—Wools of different countries.—Comparison ofvarious American wools.—Cashmere.—Alpaca.—Mohair.—Points to be lookedfor when purchasing wool.—Explanation of the term Fleece Wool.—Gradingof the fleece. Note.—Wool scouring and drying considered under Chemistry and Dyeing. WOOLEN YARNS Preparatory Processes.—Burring and picking.—Consideration of thevarious burring and picking machines in general use.—Preparation of methods adopted in laying down according to desired percentages.—Oiling the mix.—Testing and selection of oils. Carding.—Theory of carding.—Ex])lanation of the term set of cards.—Names and uses of the various rolls and cylinders.—Truing up of cylinders.—. WOOL CARDING AND SPINNING. The necessary settings and adjustments, tugether with calculations for changesin the speeds of the different parts. Card Clothing.—The essentials of good clothing.—Construction, classifica-tion, and uses.—Methods of clothing the various rolls and cylinders.—Theprinciples of grinding and the practical accomplishments thereof.—Frame,Traverse and roll grinders. Feeds.—Hand, ball, creel, and automatic feeds carefully considered.—The construction and adjustments necessary for the satisfactory operation otthe Bramwell, Apperly, Scotch, Tindel, Fisher, etc. Condensers.—The various forms of condensers in general use.—Ring sys-tem.—Single and double doffers.—Bolette single doffer.—Steel blade dividers.—German single doffer strap dividers. Rubbing Motions.—Rolls.—Aprons.—Aprons and rolls combined.—Single,double and quadruple bank apron rubbers thoroughly studied, together with themethods and appli
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