Anthony, Gardner Chace, 1856- [from old catalog], Ashley, George Francis, [from old catalog] joint author · Boston, D. C. Heath & co. · leaf 88
PARABOLOIDFig. 149. TORUS {ANNULAR). Fis:. 150. … SERPENTINEFig. 151. CHAPTER IV TANGENT PLANES 104. A plane is tangent to a single-curvedsurface when it contains one, and only oneelement of that surface. The two lines com-monly determining a tangent plane are the tan-gent element and a tangent to the surface atsome point in this element. If this…
Geometry, Descriptive
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-721-493.webp)
