Letter from Becker & Sons to B.J. Harrington, written from New York. Letter regarding order of analytical balance and weights.
Letter from W.H. Williams to B.J. Harrington, written from New York.
Letter from Alfred Clarke to B.J. Harrington, written from New York.
Letter from Alfred Clarke to B.J. Harrington, written from New York.
Letter from Chas.A. Bunting to B.J. Harrington.
Letter from Thos. Egleston to B.J. Harrington, written from New York.
Letter from Thos. Egleston to B.J. Harrington, written from New York.
Letter from Alexis A. Julien to B.J. Harrington, written from New York.
Letter from W.J. Rohrbeck to B.J. Harrington, written from New York.
Letter from H.A. Roebling to B.J. Harrington.