Hv LITERATURE UPON GRAPHICAL STATICS. 



Keck, W. " Ueber die Ermittclung der Spannungen in Fachwerk tragern 

 mit Hulfe der graphischen Statik." Zeitschr. d. hannov. Arch. u. lug. 

 Ver., 1870, p. 153. Separate reprint, Hannover, 1872. [Presentation 

 of the method with reference to practice.] 



JenTdn " On the Practical Application of Reciprocal Figures to the Cal- 

 culation of Strains in Frame-work. Transact, of the R. Soc. of Edin- 

 burgh, 1870, (XXV.) p. 441. 



Maxwell, Prof. Clerk " Reciprocal Figures, Frames, and Diagrams of 

 Forces." Trans, of R. Soc. of Edinburgh, 1869-70. 



Unwin " Iron Bridges and Roofs." London, 1869. [Application to root 

 trusses, wind force, etc.] 



Banken, F. A. " The Strains in Trusses." New York, Appleton, 1872. 

 [Examples of simple trusses drawn to scale.] 



Bow, Robert H. " Economics of Construction in Relation to Framed Struc- 

 tures." London, 1873. [Application of Maxwell's Method only to 

 roof trusses, etc.] 



Ott, K. von " Das Fachwerk." In Grundzuge d. graph. Rechnens u. d. 

 graph. Statik. Prag, 1872. [litoc-f: trusses, truss fixed at one end and 

 free at the other, bridge trusses.] 



Renleaux " Hilfslehren aus der Grapho statik." Second chap, of the Con- 

 structeur, third ed., 1872. [Compound truss, roof trusses, etc.] 



Schaffer "Graphische Ermittelung der Ordinaten des Schwedler'schen 

 TrSgere." Zeitschr. fur Bauwesen, 1873, p. 237. [Proceeding from 

 the equation for the same.] 



Heitser "Graphische Ermittelung der Ordinaten des Schwedler'schen 

 TrSgers." Zeitschr. f. Bauwesen, 1873, p. 523. [Preceding method 

 simplified another by means of equilibrium polygon.] 



VL APPLICATION TO THE IRON ARCH. 



Culmann, K " Der Bogen." Sixth chap, der graph. Statik, 1866. [Con- 

 tains also the inverted or suspended arch. The arch as a rigid body.] 



Durand-Claye, A. " Sur la verification de la stability des arcs me"talliques 

 et sur 1'emploi des courbes de pression." Ann. d. ponts et chauss., 

 1868, sem. 1, p. 109. [Mery-Durand pressure curves, but with refer- 

 ence to the absolute resistance of the material.] 



Fr&nkel, W. " Zur Theorie der elastischen Bogentra'ger." Zeitschr. d. han- 

 nov. Arch. u. Ing. Ver., 1869, p. 115. [Following out Mohr's idea of 

 the equilibrium polygon as elastic line.] 



Qfohr " Beitrag zur Theorie der elastischen Bogentrager." Zeitschr. d. 

 hannov. Arch. u. Ing. Ver., 1870, p. 389. [Criticism of the preceding 

 method, and giving another.] 



Vala " Beitrage zur graphischen Berechnung elastischer Bogentrager mit 

 Kampfergelenken." Mitth. d. Arch. u. Ing. Ver., in Bohmen, 1873. 



Greene, Cfuu. E. "Graphical Analysis of Roof. Trusses." Chicago, 1877. 



