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Gracias a los integradores mecanicos de James Thomson , el hermano del anterior William Thomson , se pudo construir un analizador diferencial , construido por H.L.HAZEN y Vannevar Bush en 1876.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.