In conclusion, we should like to draw attention to the law of 1831, which regulates the distribution of pensions by means of groups classified according as the loss is of two limbs or of one. No distinction is made with regard to the seat of the amputation. But a man who has lost both legs and has been suitably equipped with artificial limbs can earn a fair wage, whereas a man who has lost both arms is completely disabled so that he cannot even wash or dress himself. Among the amputation cases the difference is also considerable in the lower limb, between amputation through the leg and through the thigh, and even more in the upper limb, between an amputation retaining the movements of the elbow and one in which they are lost. There is, moreover, a great difference in the quality of stumps and the consequent utility of the artificial limb. It is of course impossible to allow with mathematical precision for all degrees of disablement, but the several general distinctions which we have enumerated could be taken into consideration without difficulty. INDEX American chuck, 122 Angle at which foot is set, 34, 49 Appliances for use instead of hand, 108 with mobile joint, 123 with universal joint, 126 Artificial hand, 96 spring grip thumb, 97 automatic thumb, 98 Beaufort thumb, 99 for commercial travellers, 102 automatic fingers, 105 Bearing points, 6 upon ischium, 13 upon condyles of femur, 62 upon tuberosities of tibia, 67 upon end of leg stump, 77 Bouget, 145, 151 Bonreau's appliances, 112 function of the artificial hand, 117 hook and ring, 124 length of artificial forearm, 118 Braces for suspension of artificial leg, 24 with extending sling, 43 for amputation below knee, 73 Brunet's grip, 107 Brushmaker's hook, 119 Camus, Jean, 147 Cardan joint, 126 Chauffeur's bell, 125 Combined mechanism for knee and ankle joints, 55 Combined suspension for artificial leg, 26 Condyles of femur, amputation through the, 60 Convertible peg leg, 58 Deltoid muscle, amputation through the, 143 Duplex foot, 54 Elbow joint, for above elbow amputations, 133 for below elbow amputations, 91 for below elbow amputations, short stumps, 95 for worker's arm, 139 Elephant boot, 79 Equilibrium in an artificial leg, 35 Federation leg, 33 Flexed knee, walking upon the, 66 Foot, construction, 35 with movable ankle, 50 with lateral mobility, 54 Foot, partial amputation of the, 81 Fork rest, Raynal's, 109 Frees' foot and knee, 57 Gripouilleau, vine-dresser's hook, 112 agricultural hook and ring, 124, 126 ploughman's hand, 141 Guyon's amputation, 78 Hip joint, disarticulation at the, 64 Hook and ring, agricultural, 124 Boureau's, 124