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. Scientific American Volume 86 Number 05 (February 1902) . METHOD OF CONSTRUCTING BRIDGE TUNNELS UNDER(THE HUDSON RIVER, AS PROPOSED BY CHARLES M.JACOBS FOR THE PENNSYLVANIA-LONG ISLANDTUNNELS. most difficult problem will be the sinking of the piers;although we see no reason why this should not besatisfactorily and safely accomplished in spite of thevery limited head-room available. The Current Supplement. The current Supplement, No. 1,361, is begun by amost interesting article on Mexico, with eight illus-trations. This is the first article of the series. Inview of the Pan-American Congress w

. Scientific American Volume 86 Number 05 (February 1902) . METHOD OF CONSTRUCTING BRIDGE TUNNELS UNDER(THE HUDSON RIVER, AS PROPOSED BY CHARLES M.JACOBS FOR THE PENNSYLVANIA-LONG ISLANDTUNNELS. most difficult problem will be the sinking of the piers;although we see no reason why this should not besatisfactorily and safely accomplished in spite of thevery limited head-room available. The Current Supplement. The current Supplement, No. 1,361, is begun by amost interesting article on Mexico, with eight illus-trations. This is the first article of the series. Inview of the Pan-American Congress w Stock Photo
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. Scientific American Volume 86 Number 05 (February 1902) . METHOD OF CONSTRUCTING BRIDGE TUNNELS UNDER(THE HUDSON RIVER, AS PROPOSED BY CHARLES M.JACOBS FOR THE PENNSYLVANIA-LONG ISLANDTUNNELS. most difficult problem will be the sinking of the piers;although we see no reason why this should not besatisfactorily and safely accomplished in spite of thevery limited head-room available. The Current Supplement. The current Supplement, No. 1,361, is begun by amost interesting article on Mexico, with eight illus-trations. This is the first article of the series. Inview of the Pan-American Congress which was held inthe city of Mexico and the visit of the Mining Engi-neers to Mexico, this series will prove valuable. It isan abstract of a lecture delivered by Dr. W. P. Wilson,Director of the Philadelphia Commercial Museums.Benzine Motor Cycle describes in great detail onetype of these interesting machines, and is accom-panied by elaborate drawings. Tubes with Sidesand Without in Ship Resistance—An Example fromLord Kelvin is by Marston Niles. Behind t

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