Wool, 1. ---- action of acid on, 11. ---- alkalies, action of on, 9. ---- batching, 15. ---- black, 89. ---- ----- 6 B, 171, 180, 181, 186. ---- bleaching, 29. ---- --------- peroxide of hydrogen, 34. ---- --------- -------- of soda, 36. ---- --------- with sulphur, 30. ---- chemical composition of, 6. ---- chlorination of, 37. ---- blue B X, 153. ---- ---- dyeing with logwood, 161. ---- fibre under microscope, 2. ---- ----- unscoured, 10. ---- ----- chemical composition of, 7. ---- ----- scoured badly, 10. ---- ----- showing medullary centre, 4. ---- ----- heated with acid, 11. ---- grey R, 166. Woollen piece goods, scouring of, 28. ------- yarn, 2. Wool oil, 26. ---- physical properties of, 2. ---- -------- structure, variations in, 5. Wool scouring, 15, 17. ---- -------- by solvents, 23. Wool-washing machine, 20, 21. Worsted yarn, 2. Wringing of goods, 197. #Y.# Yarn-drying machine, 208. Yarn, washing of, in hanks, 202. Yarn wringing, 198. Yellow, 125, 195. ------ brown, 161. ------ N, 125, 133, 134. ------ olive, 135. ------ shades on wool, 123. Yolk, 7. Yorkshire grease, 26. #Z.# Zambesi black B, 170, 181. ------- ----- D, 170, 180, 181. ------- ----- F, 171. ------- blue R A, 180, 181. ------- brown G, 171, 181. ------- ----- 2 G, 171. ------- dyes, 168. Zinc dust, 141. The Aberdeen University Press Limited. CATALOGUE (p. c01) Of _Special Technical Books_ For Manufacturers, Technical Students And Workers, Schools, Colleges, Etc. By Expert Writers Index To Subjects.