BIOGRAPHY CHARLES GOODYEAR The life and discoveries of tion 12571 IL BIOLOGY Can we Separate Animals from Plants?—By ANDREW WILSONA debated point well discussedThe bases on which distinctions must be drawn 12581 III. ELECTRICITYA New Electric Ballistic TargetA target for investigations of the velocity of projectiles now in use at the United States Military A cademy West Point N. illustration. 12574 Electric ErygmascopeAn electric lighting apparatus for ex amining earth strata in bore holes for geologists' and prOnpeetOrs' illustration 12574 The Electra-Magnet—By Prof. SILVANUS
BIOGRAPHY CHARLES GOODYEAR The life and discoveries of tion 12571 IL BIOLOGY Can we Separate Animals from Plants?—By ANDREW WILSONA debated point well discussedThe bases on which distinctions must be drawn 12581 III. ELECTRICITYA New Electric Ballistic TargetA target for investigations of the velocity of projectiles now in use at the United States Military A cademy West Point N. illustration. 12574 Electric ErygmascopeAn electric lighting apparatus for ex amining earth strata in bore holes for geologists' and prOnpeetOrs' illustration 12574 The Electra-Magnet—By Prof. SILVANUS THOMPS0N000- cial points of illustrations 12572 IV. EN YOMOLOGYPotash SaltsThe use of potash salts as insec ticides with accounts of experiments 12576 The Outlook for Applied EntomologyBy Dr. C. V. RILEY entomologistThe conclusion of Prof. Riley's lecture treating of sociated 12576 V. INSURANCEThe Expense Margin in Life InsuranceElabor ate review Of the necessary expenses of conducting the insurance of lives. With tables and calculations 12577 VI. MATHEM A TICSThe Trisection of Any AngleBy FRED' ERIC B. HONEY very ingenious demonstration of this problem based on t he properties of conjugate hyperbolas vol. METEOROLOGY—Note on the Mt. Blanc Meteorological Sta- tion The Flood at KarlsbadACcount of the recent tiood and of its destructive illustration 12578 VIII. M KUL! A L ENGIN IS ERINGStation for Testing Agri cultural MachinesA proposed establishment for applying dy namometer tests to agricultural illustration 12569 Steam Engine ValvesBy THOMAS HAWLEYA review of modern slide valve practice the lap cut-off and other illustrations 12567 IX. MISCELLANEOUSScience in the TheaterCurious examples trations Theatrical Water PlaysRecent episodes in real water plays at Hengler's Circus illustrations 12578 X. NA VAI ENGINEERINGThe French Ironclad War Ship Col bertAn armored wood and iron ship with central battery
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