“Prof Rogers was in with a working model of his Steam and air Engine operating upon the principle of the “Jefford Injector” for Steam Boilers.”—Horatio Nelson Taft

SATURDAY 16

A delightful and bright warm day, but muddy in the streets. Worked pretty busily in the office today. Prof Rogers was in with a working model of his Steam and air Engine operating upon the principle of the “Jefford Injector” for Steam Boilers. In Rogers Engine the Steam took in a current of air into the Steam chest. He claims a gain of nearly 100 pr cent over the Comn [common?] S Engine. A boy brought a Box of excellent Cigars, present from W A Lighthall. Was in at Willards this evening. Saw W VanMaster from Lyons there, bot “Times.”

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The three diary manuscript volumes, Washington during the Civil War: The Diary of Horatio Nelson Taft, 1861-1865, are available online at The Library of  Congress.