| TABLE OF CONTENTS. |
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| I. | ENGINEERING AND MECHANICS--Dry Air RefrigeratingMachine. 5 figures. Plan, elevation, and diagrams of a new Englishdry air refrigerator |
| Thomas' Improved Steam Wheel. 1 figure |
| The American Society of Civil Engineers. Addressof President Francis, at the Thirteenth Annual Convention, atMontreal. The Water Power of the United States, and itsUtilization |
| II. | TECHNOLOGY AND CHEMISTRY.--Alcohol in Nature. Itspresence in earth, atmosphere, and water. 6 figures. Distillatoryapparatus and (magnified) iodoform crystals from snow water, fromrain water, from vegetable mould, etc. |
| Detection of Alcohol in Transparent Soaps. By H.JAY |
| On the Calorific Power of Fuel, and on Thompson'sCalorimeter. By J.W. THOMAS |
| Explosion as an Unknown Fire Hazard. A suggestivereview of the conditions of explosions, with curiousexamples |
| Carbon. Symbol C. Combining weight. 12. By T. A.POOLEY Second article on elementary chemistry written forbrewers |
| Manufacture of Soaps and their Production. By W.J. MENZIES |
| The Preparation of Perfume Pomades. 1 figure."Ensoufflage" apparatus for perfumes |
| Organic Matter in Sea Water |
| Bacteria Life. Influence of heat and variousgases and chemical compounds on bacteria life |
| On the Composition of Elephant's Milk. By Dr.CHAS. A. DOREMUS. Comparison of elephant's milk with that of tenother mammals |
| The Chemical Composition of Rice. Maize, andBarley. By J. STEINER |
| Petroleum Oils. Character and properties of thevarious distillates of crude petroleum. Fire risks attending theuse of the lighter petroleum oils |
| Composition of the Petroleum of the Caucasus. ByP. SCHULZENBERGER and N. TONINE |
| Notes on Cananga Oil. or Ilang-Ilang Oil. By F.A. FLÜCKIGER. 1 figure. Flower and leaf of Canangaodorata |
| Chian Turpentine, and the Tree which Produces It.By Dr. STIEPOWICH. of Chios, Turkey |
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