Scientific American Supplement, No. 787, January 31, 1891
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Table of contents
1. NEW YORK, January 31, 18912. THE FRENCH IRONCLAD WAR SHIP COLBERT.3. STEAM ENGINE VALVES.14. FIRING POINTS OF VARIOUS EXPLOSIVES.5. STATION FOR TESTING AGRICULTURAL MACHINES.6. WATER SOFTENING AND PURIFYING APPARATUS.7. THE TRISECTION OF ANY ANGLE.8. TEST CARD HINTS.9. CHARLES GOODYEAR.10. THE ELECTROMAGNET.111. A USEFUL GUIDING PRINCIPLE.12. ELECTRIC ERYGMASCOPE.13. A NEW ELECTRIC BALLISTIC TARGET.14. THE OUTLOOK FOR APPLIED ENTOMOLOGY.115. POTASH SALTS.116. THE EXPENSE MARGIN IN LIFE INSURANCE.17. THE FLOOD AT KARLSBAD.18. THEATRICAL WATER PLAYS.19. SCIENCE IN THE THEATER.20. NEWER PHYSIOLOGY AND PATHOLOGY.21. THE COMPOSITION OF KOCH'S LYMPH.22. CAN WE SEPARATE ANIMALS FROM PLANTS?23. THE RECOVERY OF SILVER AND GOLD FROM PLATING AND GILDING SOLUTIONS.24. Architects and Builders Edition25. Useful Engineering Books26. PATENTS.