Horatio Allen

1802 – 1889

• Astronomy in its general facts and relations, taught by aid of mechanical presentation and illustration
• Earth and sun instrument
• Statement made by Horatio Allen, Esq., civil engineer, before the Naval Committee of the House of Representatives, establishing the superior stability of the sectional dock over that of the balance dock, and its superior advantages for naval purposes
• Summary comparison of the stone dock with the sectional floating dock, when used in combination with a basin and arrangements to place ships on shore
• Sun, planet and star instrument
• The railroad era