TABLE OF CONTENTS. 



Page, 



i. The Nature of Muscular Fibres, , * . .* i • * 



%, The Nature of Muscular Contraction, , . . » . § 



a. The muscular susurrus^ > , . > * » > 16 

 Determination of its note, , , . > . . > l 9 



p. Dr. Collongues on the note of the susurrus, , , , 23 



3. Statical Work done by Muscles, .; . .' .* , 24 



Shoulder muscles (unloaded), , , . . . « 27 



b, Shoulder muscles (loaded), 28 

 A Law of fatigue, 29 

 d. Flexors of forearm, , . » . > > > > 35 

 g, Attempt to calculate statical work, by considering the arm 



as a pendulum, alternately depressed and raised, , . 37 



f. Equation of fifth degree rejected, , » . . . 4 1 

 Statical work represented by a cubical hyperbola and cus^ * 



pidal cubic, 43. 44 



4. Dynamical Work done by Muscles, 4^ 



a, Work done in rowing, e . , t 47 



b, Work done in climbing, , , , , , , , 51 



c, Work done in walking, , , , , , . , 57 



d, Work done by labourers, s 58-63 



5. The Absolute Force of Muscles, 63 



a, Coefficient of force of the muscles of the arm, , , 64 



b, Coefficient of force of the muscles of the leg, 67 



c, Borelli's observations on the force of muscles, . 74 



6. Comparative Anatomy of the Tendons of the Hand and 



Foot, and their Mechanjcal Uses, 74 



A. Comparative Anatomy of the tendons of the foot, . . 76 



a, Man, .....„.,.„, 76 



b, Chimpanzee, 92 



c, Monkeys of the Old Continent, 92 



d, Monkeys of the New Continent, , , > , 94 



m . b 



