Show spiral tower at tile lie worlds world r fair stir carl L lehman of chicago has designed sig ned a spiral tower which lie ho would like to see erected on tho the grounds of the worlds fair there are no details as to dimensions but it is explained that passengers will bo be carried to tho the top by means of a small railroad inside this proposed novel structure is thus described by tho the new york safety power the spiral is f from rom bottom to top having no supplemental support above tho the foundation tile the we weights ats and the iron and steel have been so calculated as to leave a large margin of safety ev i M nn fv finn AL vp 41 TITE THE PROPOSED TOWER grything ery thing being based on well known and proved formulas formulas of stress and supportable strain there is to be a terrace extending from bottom to top a pavilion and gallery at tho the top observatories or galleries at suitable intervals apart and a spiral roadway around tho the outside of the ferraco ter raco the tower has a foundation of masonry land and terrace the cross section of which Is a trapezoid a spiral roadway projecting from the bottom of the terrace and a railway track within the terrace |