LIST OF PLATES. 



I. THE FRAMEWORK OF THE MACHINE, . frontispiece. 

 II. THE MUSCLES OF THE MACHINE, . to face page 43 



III. BAD AND GOOD SEAT, . . .' - V 80 



IV. THE ARAB TYPE, . . . ,,86 

 V. " TONGS ACROSS A WALL " THE MODERN 



MILITARY SEAT, . . . ,,91 



VI. THE EXTREME CHAIR-SEAT THE EXTREME 



FORK-SEAT, . . . . 95 



VII. THE OPEN SEAT AND HIGH PACK THE 



CLOSE SEAT AND FLAT PACK, . 97 



