68. To cast images in plaster, 73 69. To produce embossed letters on marble, 74 70. To soften stone, 75 71. To change wood, apparently, to stone, 76 72. To render wood, cloth or paper, fire proof 77 73-75. To produce fire readily, 77 76. To make super-combustible matches, 78 77. To make gun powder, 79 78. To make the common fulminating powder, 80 79. To make mercurial fulminating powder, 80 80. To kindle a fire under water, 82 81. To light a candle by application of ice, 82 82. To form letters or flowers of real flame, 83 83. To produce flame of various colours, 84 84. To make sky rockets and fire wheels, 85 85. To produce detonating balloons, 87 86. To prepare a phial that will give light in the dark, 89 87. To make a person's face appear luminous in the dark, 89 88. To freeze water in warm weather, 90 89. To change the colours of animals, 91 90. To give leather a beautiful metallic lustre, 92 91. An easy method of extracting the essence of roses, 92 92. To prepare various kinds of essences, 93 93. To prepare soda water, 94 94-95. To produce metallic trees, 95 96. To tin copper by boiling, 96 97. A metal that will melt in hot water, 96 98. Illustration of calico printing, 96 99. To prepare an imitation of gold bronze, 99 100. To procure the exhilarating gas, 99 101. Construction of the galvanic pile or battery, 101 102. Construction of the oxy-hydrogen blow-pipe, 102 103. To make a dry phosphorescent powder, 104 104. Curious experiment of precipitation, 105 105. To make a beautiful soft glass for jewelry, 105 106. Composition of various kinds of glass, 106 107. Composition of various alloys, 107 108. To produce various kinds of gas, 108 109. Various chemical tests, 110 110. To produce a picture instantly, 111 111. A cheap imitation of silver bronze, 112 112. To make crayons of various colours, 113