on a white ground 146 37. Diagram of Zuñi roof construction 149 38. Showing abutment of smaller roof-beams over round girders 151 39. Single stone roof-drains 153 40. Trough roof-drains of stone 153 41. Wooden roof-drains 154 42. Curved roof-drains of stone in Tusayan 154 43. Tusayan roof-drains; a discarded metate and a gourd 155 44. Zuñi roof-drain, with splash-stones on roof below 156 45. A modern notched ladder in Oraibi 157 46. Tusayan notched ladders from Mashongnavi 157 47. Aboriginal American forms of ladder 158 48. Stone steps at Oraibi with platform at corner 161 49. Stone steps, with platform at chimney, in Oraibi 161 50. Stone steps in Shumopavi 162 51. A series of cooking pits in Mashongnavi 163 52. Pi-gummi ovens of Mashongnavi 163 53. Cross sections of pi-gummi ovens of Mashongnavi 163 54. Diagrams showing foundation stones of a Zuñi oven 164 55. Dome-shaped oven on a plinth of masonry 165 56. Oven in Pescado exposing stones of masonry 166 57. Oven in Pescado exposing stones of masonry 166 58. Shrines in Mashongnavi 167 59. A poultry house in Sichumovi resembling an oven 167 60. Ground-plan of an excavated room in Kin-tiel 168 61. A corner chimney-hood with two supporting poles, Tusayan 170 62. A curved chimney-hood of Mashongnavi 170 63. A Mashongnavi chimney-hood and walled-up fireplace 171 64. A chimney-hood of Shupaulovi 172 65. A semi-detached square chimney-hood of Zuñi 172 66. Unplastered Zuñi chimney-hoods, illustrating construction 173 67. A fireplace and mantel in Sichumovi 174 68. A second-story fireplace in Mashongnavi 174 69. Piki stone and chimney-hood in Sichumovi 175 70. Piki stone and primitive andiron in Shumopavi 176 71. A terrace fireplace and chimney of Shumopavi 177 72. A terrace cooking-pit and chimney of Walpi 177 73. A ground cooking-pit of Shumopavi covered with a chimney 178 74. Tusayan chimneys 179 75. A barred Zuñi door 183 76. Wooden pivot hinges of a Zuñi door 184 77.