I. SPECIAL COLLECTIONS. 105 



SECTION 4 KINEMATICS, STATICS, AND 

 DYNAMICS. 



WEST GALLERY, GROUND FLOOR, ROOM K. 



I. SPECIAL COLLECTIONS. 



COLLECTION OF APPARATUS USED BY 'SGRAVESANDE TO ILLUS- 

 TRATE HIS PHYSICAL RESEARCHES. 



524. 'sGravesande's Apparatus to demonstrate the 

 Laws of Centrifugal Force. 



Professor Dr. P. L. Rijke, Ley den. 



(See 'sGravesande's " Physices Elementa Mathematica," 3rd edition, Vol. 

 I., p. 153.) 



525. 'sGravesande's Apparatus to demonstrate the 

 Theory of the Wedge. Professor Dr. P. L. Rijke, Leyden. 



526. 'sGravesande's Apparatus, to show, by means of a 

 pendulum furnished with weights and springs, that the same 

 quantity of Mechanical Labour produces the same quantity 

 of Living Force. Professor Dr. P. L. Rijke, Leyden. 



527. 'sGravesande's Apparatus to demonstrate the Laws 

 of Falling Bodies. Professor Dr. P. L. Rijke, Leyden. 



528. 'sGravesande's Apparatus for Parabolic Motion. 



Professor Dr. P. L. Rijke, Leyden. 



COLLECTION OF KINEMATIC MODELS, EXHIBITED BY THE KONIGL. 

 GEWERBE-AKADEMIE, BERLIN, PROF. REULEAUX, DIRECTOR. 



The models in this collection are connected throughout with Professor 

 Reuleaux's treatment of the theory of machines. Their nature will be found 

 fully discussed in his " Theoretische Kinematik " (Vieweg und Sohn). The 

 English edition of this work (Macmillan), translated and edited by Professor 

 Alexander B. W. Kennedy, C.E., of University College, London, will, it is 

 hoped, be ready early in May. The English names of the mechanisms here 

 given are those used by Professor Kennedy in his translation. 



