(JOXTENTS. XIX 



. 105. Series of Scalene Eight-sided Pyramids 105 

 . 10'J. Limits of the Series of Scalene Eight-sided Pyra- 

 mids . . . 10& 

 . 107- Subordinate Series . . 107 



3. Derivations from the Rhombohedron. 



.103. Derivation of Homogeneous Forms . 108 



.100. Ratio of the Derived Ithombohedrons . 109 



.110. Series of Ithombohedrons . . Ill 



. 111. Limits of the Series of Rhombohedrons 112 



.112. Derivation of Scalene Six-sided Pyramids . 114 



. 113. The transverse Sections of the Scalene Six-sided 



Pyramids depend on m . . 116 



.114. Series of Scalene Six-sided Pyramids . 116 



.115. Limits of the Series of Scalene Six-sided Pyramids 118 

 .116. Subordinate Series . . .121 



. 117- Derivation of Isosceles Six-sided Pyramids 123 



. 118. Series of Isosceles Six-sided Pyramids . 124 



4. Derivations from the Hexdliedron. 



. 119. Different Positions of a moveable Plane . 125 

 . 120. Production of the Forms of several Axes 128 



. 121. The Octahedron . . .129 



. 122. The Dodecahedron . . 129 



. 123. The Octahedral Trigonal-icositetrahedron . 130 



. 124. The Hexahedron . . 131 



. 125. The Digrammic Tetragonal-icositetrahedron 131 



. 126. The Hexahedral Trigonal-icositetrahedron 132 



. 127. The Tetracontaoctahedron. Designation of the 



Tessular Forms . . .133 



. 128. Resolution of Forms belonging to the first degree 



of regularity . . 135 



. 129. The Tetrahedron . . .138 



. 130. The Hexahedral Pentagonal-dodecahedron 138 



. 131. The Digrammic Tetragonal-dodecahedron 139 



f . 132. The Trigonal-dodecahedron . 140 



