CONTENTS. 



1 . Ciliary motion. 



Parts in which it exists . . . . . . . . . . . . 1 



Its phenomena and nature . . . . . . . . . . . . 2 



2. Of the muscular and the allied motions. 



A. The elastic and contractile tissue of arteries . . . . . . . . 2 



Nature of the contractile arterial tissue . . . . . . . . 3 



Evidence in favour of its being muscular . . . . . . . . 3 



Proofs afforded by the miscroscope . . . . . . . . . . 3 



chemical agents . . . . . . . . . . 3 



galvanism . . . . . . . . . . 4 



B. T/te muscular tissue. 



a. Structure of the muscular fibre . . . . . . . . . . 5 



Cause of the striped appearance of animal muscular fibre . . . . . . ' 6 



Relative size of the fibres and fibrils of striped muscle in the foetus and adult 6 



Attachment of muscle to tendon . . . . . . . . . . 7 



Involuntary muscles which are composed of striped fibres . . . . . . 7 



b. The vital properties of muscle. 



Its apparent hardness in the state of contraction . . . . . . . . 7 



Changes in its elementary fibres during contraction . . . . . . 7 



Condition of muscles during rigor mortis . . . . . . . . 8 



Involuntary as well as voluntary muscles subject to rigidity . . . . 9 



Their irritability a property of the muscles themselves .. .. .. 10 



3. Voice and Speech. 



Speaking machine . . . . . . . . . . . . . . 11 



Ventriloquism . . . . . . . . . . . . . . 11 



The falsetto voice . . . . . . . . . . . . . . 11 



4. Of the Senses. 



A. Of the senses generally . . . . . . . . . . 13 



Influence of heat and cold on the nerves of sense . . . . . . 13 



B. Of the sense of vision .. .. .. .. .. .. 14 



a. Tunics of the eye . . . . . . . . . . . . 14 



The tapetum .. .. .. .. .. .. .. 14 



its structure .. .. .. .. .. .. 14 



its luminous appearance in man . . . . . . . . 15 



The iris .. .. . . .. .. .. 15 



nerves by which its dilatation and contraction are influenced . . 15 

 nature of the fibres composing it . . . . . . . . 16 



