Potatoes, crushing and steaming, 111, 117 extraction of starch from separately, 122 isolation of starch from, 122 keeping, 110 mashing, 110, 118, 125 plant for distilling, 204 rasp for pulping, 152 saccharifying by sulphuric acid, 124 starch from, 122 steaming, 111 under high pressure, 11, 118, 121 vat for, 112, 121 steamer and crusher for, 111, 117 vacuum cooker for, 11 "Proof spirit", 175 Rectification, 82, 92 by filtration, 101 Rectifying apparatus, 87 Barbet's, 94 Gillaume, 97, 99 intermittent, 90 Vulcan, 93 Regulating distillery fire, 61 Relative quantities of alcohol in grains, 126 Rice, (see Grains). Saccharification, 8, 10, 14 by sulphuric acid, 138 complete, 185 of grain, signs of, 137 Saccharifying apparatus, 14 Specific gravity of alcohol, 2, 174 calculating, 174 Steam generator, 114 regulator, 69 Steamers, high pressure, 11, 12 Steaming under high pressure, 13 Steaming grain, 136 potatoes, 111 under pressure, 118, 121 vat, 112 Steeping barley, 105 grain, 129 sufficiently, 130 temperature, 130 Stills, (see Distilling Apparatus). Sulphuric acid for saccharifying grain, 138 neutralizing, 86 Sykes' hydrometer, 177 Testing Alcohol for purity, 187 Twin column rectifier, 95 Vacuum cooker, 10, 11 Vulcan rectifying still, 93 stills, 73, 77 traps, 75 Water for distilling, 208 Yeast, 20 brewers, 11 fermentation by, 9, 10 * * * * * ELECTRICAL BOOKS. =THE DISEASES OF ELECTRICAL MACHINERY.= By ERNST SCHULZ. Edited with a preface by Sylvanus P. Thompson. Contents of Chapters: 1, _Continuous Current Machines_; breakdowns in the armature; brushes and brush holders; faults in the field winding; faults in the regulator or starter. 2, _Singlephase and Polyphase Generators_; faults in armature; grounds in generators; connections of different phases; field windings. 3, _Singlephase and Polyphase Induction Motors_; stator faults; rotor faults. 4, _Transformers_; faults in winding; effects of lightning. 5, _Efficiency_; examples of efficiency calculations. 94 pages, 42 illustrations, 12mo., cloth, $1.00. =ELECTRICAL TABLES AND MEMORANDA.= A valuable little reference book for engineers, electricians, motor inspectors and others interested in the electrical science, containing many tables and much valuable information in a very small space, with a number of illustrations, by PROF. SILVANUS THOMPSON. 64mo., roan, gilt edges, 40c. =THE VOLTAIC ACCUMULATOR.= By EMILE REYNIER. Contents: Part 1, Principles, definitions, voltmeters. Part 2, Voltaic accumulators of various types. Part 3, Technology. Part 4, Application of accumulators. 202 pages, 62 illustrations, cloth, $3.00.