DescriptionThe Eighth Wonder. [By Carl C. Gray and H.F. Hagen.] Boston: B.F. Sturtevant Company, [1927]. First edition. 8vo brown cloth. 64 pp. plus illustrations. It is considered a very useful monograph regarding the Holland Tunnel, a significant engineering achievement. First published in 1927 by the company that made ventilation fans for the tunnel. Author Hagen was a fan engineer and was associated with the Sturtevant Company. No table of contents or index; list of the 39 illustrations, most are photographs. ILLUSTRATIONS Facing Page Clifford Milburn Holland 14 Site of the Holland Tunnel, Looking West from New York City 15 Sectional View of the Holland Tunnel 18 Plan and Profile of the Holland Tunnel 19 Holland Tunnel and Hudson and Manhattan R.R. Tunnel 22 Assembling Shield in Canal Street Shaft 23 Land Shaft Caisson at Spring Street, New York City 24 Shield, South Tunnel, Canal Street at West Street, New York City 25 Gang of "Sand Hogs" in Line 28 Hauling a Car of Muck out of a Muck Lock, South Tunnel 28 Concrete Roadway 29 Concrete Bulkhead and Locks 29 Longitudinal Section Through Tunnel Heading, Showing Construction Operations 32 New Jersey River Shaft Caisson, Just after Leaving the Ways 33 Tightening Bolts in Tunnel Lining, North Tunnel 36 Erector Arm 37 Holing Through! 38 Curve in South Tunnel under West Street, New York City (Radius 1000 Feet) 39 Concrete Construction in South Tunnel 42 Model of the Holland Tunnel Showing Many of the Hidden Details 43 Rest and Refreshment in Rotherhithe Tunnel, River Thames, London, England 46 Heavy Traffic on the Blackwall Tunnel, River Thames, London, England 47 Cross Section - One Tube of Holland Tunnel 51 East Blower Air Duct 52 Fresh-Air Duct in South Tunnel, N. J. Side 53 Tile and Bronze Work 53 Land Ventilation Building 54 River Ventilation Building 55 Special Apparatus Erected at Hyde Park Plant of B. F. Sturtevant Company 56 Sturtevant Silentvane Fan Wheels for the Holland Tunnel 57 Typical Vertical Section Through Ventilating Building 57 One of the 84 Sturtevant Silentvane Fans 58 Exhaust Fan Unit in N. J. Land Ventilation Building 59 The Holland Tunnel Completed 60 Condensation in North Tunnel 61 Ole Singstad, Chief Engineer 62 Model of Entrance to Tunnel, New York City 63 Model of Exit from Tunnel, New York City 63 Location Plan of Holland Vehicular Tunnel 64 (A text version of this work can be found in archives 2011.005.0064 where the work appears with author credits and the plates reproduced. It was a slight revision published in the Smithsonian Institution Annual Report for 1931. See notes.) 8vo hardcover