=——Fixation of Atmospheric Nitrogen.= Illustrated. 5 x 7-1/2. cloth. 120 pp. (Van Nostrand’s Chemical Monographs.) =net, $0.75= =KOLLER, T. Cosmetics.= A handbook of the manufacture, employment and testing of all cosmetic materials and cosmetic specialties. Translated from the German by Charles Salter. 8vo. cloth. 262 pp. =net, $2.50= =—— Utilization of Waste Products.= A treatise on the rational utilization, recovery and treatment of waste products of all kinds. _Second Revised and Enlarged Edition._ 22 illustrations. 5-3/4 x 8-3/4. cloth. 336 pp. =net, $3.00= =KREMANN, R. The Application of Physico-chemical Theory to Technical Processes and Manufacturing Methods.= Authorized translation by Harold E. Potts, M.Sc. 35 diagrams. 8vo. cloth. 215 pp. =net, $2.50= =KRETSCHMAR, KARL. Yarn and Warp Sizing in All Its Branches.= Translated from the German by C. Salter. 122 illus. 8vo. cloth. 192 pp. =net, $4.00= =LAMBORN, L. L. Modern Soaps, Candles and Glycerin.= 224 illustrations. 8vo. cloth. 700 pp. =net, $7.50= =—— Cotton Seed Products.= 79 illus. 8vo. cloth. 253 pp. =net, $3.00= =LASSAR-COHN. Introduction to Modern Scientific Chemistry.= In the form of popular lectures suited for University Extension students and general readers. Translated from the _Second German Edition_ by M. M. Pattison Muir. Illus. 12mo. cloth. 356 pp. =$2.00= =LETTS, E. A. Some Fundamental Problems in Chemistry: Old and New.= 44 illustrations. 8vo. cloth. 236 pp. =net, $2.00= =LUNGE, GEORGE. Technical Methods of Chemical Analysis.= Translated from the _Second German Edition_ by Charles A. Keane, with the collaboration of eminent experts. Complete in three volumes. Six parts. 448 illustrations. 6-1/2 x 9-1/2. cloth. 3494 pp. =net, $48.00= Vol. I. (in two parts). 201 illustrations. 6-1/2 x 9-1/2. cloth. 1024 pp. =net, $15.00= Vol. II. (in two parts). 149 illustrations. 6-1/2 x 9-1/2. cloth. 1294 pp. =net, $18.00= Vol. III. (in two parts). 98 illustrations. 6-1/2 x 9-1/2. cloth. 1174 pp. =net, $18.00= =—— Technical Chemists’ Handbook.= Tables and methods of analysis for manufacturers of inorganic chemical products. Illus. 12mo. leather. 276 pp. =net, $3.50= =—— Coal, Tar and Ammonia.= _Fourth and Enlarged Edition._ In two volumes, not sold separately. 305 illustrations. 8vo. cloth. 1210 pp. =net, $15.00=