[Illustration: Figure 24.--HOT-WATER AND CHOCOLATE PITCHERS of the 10-piece, silver tea service presented to Bollman by his fellow employees when he resigned from the Baltimore and Ohio in 1858. A railroad motif was used throughout, each piece being circled at top and bottom by a track, complete with rail of accurate section and ties. Spouts are in simulation of hexagonal sheet-iron chimneys, with seams riveted, and the handles are in the form of a surveyor's telescope. On the various pieces are engraved the designs of the more important B. & O. bridges. Throughout is a wonderful profusion of bits and objects of railroadiana in low relief, high relief, and fully modeled. In Board of Directors Room, Baltimore and Ohio Railroad Company, Baltimore, Md. (_Photo courtesy of Baltimore and Ohio Railroad._)] Known Bollman Works (All B. & O. works listed were designed by Bollman and built by the railroad, unless otherwise indicated.) Dates of Location Type No. spans Remarks service / length of each 1850-? Savage, Md., Little Bollman 1/76' First Bollman truss Patuxent River through erected; granite towers; truss cost, $23,825. B. & O. RR. 1851-? Bladensburg, Md., Bollman 1/? Second Bollman truss Anacostia River through erected; granite towers; truss cost, $19,430. B. & O. RR. 1851-1862 Harpers Ferry, Va., Bollman 1/124' Winchester span; first Potomac River through major Bollman truss; three truss lines of truss; granite towers; blown up by Confederate Army on September 24, 1862. B. & O. RR. 1851-? Baltimore, Md., Trestle -- Wood trestle bents with Carey Street wrought-iron diagonals. First use of iron structural members in trestlework. Total length 76 feet. B. & O. RR.