Smithson's pile, 36 Soda, 53, 92, 93 Solanine, 79 Spermatic stains, detection of, 158 Spermatozoa, 159 Starch in sulphate of quinine, 148 Stearic acid in sulphate of quinine, 148 Stas's method for alkaloids, 65 Strychnine, 78 Sugar in milk, 142 Sugar in sulphate of quinine, 148 Sulphate of copper in bread, 127 Sulphate of quinidine in sulphate of quinine, 149 Sulphate of quinine, examination of, 148 Sulphuretted hydrogen, 91 Sulphuric acid, 47, 89, 95 Sympathetic inks, tests for, 110 T. Tea, 130 Tin, 56, 61 U. v. Uslar and Erdman's method for alkaloids, 70 V. Veratrine, 77 Vinegar, examination of, 147 W. Wines, examination of, 142 Writings, examination of, 105 Z. Zinc, 64 BECKER & SONS, MANUFACTURERS OF Balances and Weights of Precision, FOR [Illustration] Chemists, Assayers, Jewelers, Druggists, _And in general for every use where accuracy is required_, No. 6 Murray St., New York. Every Balance and Set of Weights leaving this establishment is guaranteed to be accurately adjusted, as represented in our Price List. --> Our Illustrated Price List mailed on application. CATALOGUE OF THE SCIENTIFIC, MILITARY, AND NAVAL PUBLICATIONS OF D. VAN NOSTRAND, 23 Murray Street and 27 Warren Street, New York. *ABBOT, Maj. HENRY L.--Siege Artillery against Richmond.* Illustrated. 8vo, cloth $3 50 *ADAMS, J. W.--Sewers and Drains for Populous Districts.* Embracing Rules and Formulas for the dimensions and construction of works of Sanitary Engineers. Second edition. 8vo, cloth 2 50 *ALDRICH, M. ALMY.--History of the United States Marine Corps.* From Official Reports and other Documents. Compiled by Capt. Richard S. Collum. 8vo, cloth 2 50 *ALEXANDER, J. H.--Universal Dictionary of Weights and Measures*, Ancient and Modern, reduced to the Standards of the United States of America. New edition, enlarged. 8vo, cloth 3 50 *ANDERSON, Gen. ROBERT.--Evolutions of Field Batteries of Artillery.* Translated from the French, and arranged for the Army and Militia of the United States. Published by order of the War Department. 33 plates. 24mo, cloth 1 00 *ANDREWS, Maj.-Gen. C. C.--Campaign of Mobile.* Including the Co-operation of General Wilson's Cavalry in Alabama. With five maps and views. 8vo, cloth 2 50 ---- *Hints to Company Officers on their Military Duties.* 18mo, cloth 50 *ARNOLD, Maj. A. K.--Cavalry Service.* Notes on Horses for Cavalry Service, embodying the Quality, Purchase, Care, and Diseases most frequently encountered, with Lessons for Bitting the Horse and Bending the Neck. Illustrated. 18mo, cloth 75