Geometry 
 in the Long Nineteenth Century.
Most material in Net Advance Retro
antedates 1920. It may be obsolete or incorrect. 
 
- General: Introductory:
 - General:
-  
Leçons de mathématiques
donneées a l'École Normale en 1795
 by Pierre Simon Laplace
[Journal de l'École Polytechnique , VII & VIII (1812)]
 - 
The First Six Books of Euclid's Elements, in Which
Coloured Diagrams and Symbols are Used Instead of Letters
for the Greater Ease of Learners
 by Oliver Byrne
[London: Pickering, 1847]
 - 
Elementary Geometry: Congruent Figures
by Olaus Henrici
[London: Longmans, Green, 1879]
 - 
A Sequel to the First Six Books of the Elements of
Euclid, Containing an Easy Introduction to Modern
Geometry, with Numerous Examples
by John Casey
[Dublin: Hodges and Figgis, 1886]
 - 
The Elements of Geometry
 by George Bruce Halsted
[London: Macmillan, 1886]
 - 
Elementary Synthetic Geometry
 by George Bruce Halsted
[New York: Wiley, 1896]
 -  
Planimetry
 by A. P. Kiselyov
[1892] 236 pp. In Russian. The Glagolev edition
of the famous geometry textbook,
slightly revised by N. Ershov et al.
 - 
Rational Geometry: A Text-Book for the Science of Space
Based on Hilbert's Foundations
 by George Bruce Halsted
[New York: Wiley, 1904]
 
 - General: Philosophy:
 - Types:
GEOMETRIC ALGEBRA;
VECTOR;
 - Type: ANALYTIC:
 - Type: CONSTRUCTIONS:
 - Type: METRICAL:
 - Type: NON-EUCLIDEAN:
 - Type: PROJECTIVE:
- 
An Explanation of the Gnomonic Projection of the Sphere; and of
Such Points of Astronomy as are Most Necessary in the Use of
Astronomical Maps
 by Augustus De Morgan
[London: Baldwin & Craddock, 1836]
 - 
An Elementary Treatise on Trilinear Co-ordinates,
the Method of Reciprocal Polars, and the Theory of Projections
by N. M. Ferrers
[Cambridge: Macmillan, 1866]
 - 
Geometrical Conic Sections: An Elementary Treatise, in Which
the Conic Sections are Defined as the Plane Sections of a Cone,
and Treated by the Method of Projections
by Rev. J. Stuart Jackson
[London: Macmillan, 1872]
 -  
Quaternions and Projective Geometry
 by Charles Jasper Joly
[Phil. Trans. R.S.L. A201, 223  (1903)]
 - 
Synthetic Projective Geometry
 by George Bruce Halsted
[New York: Wiley, 1906]
"Man, imprisoned in a little body with short-arm hands instead 
of wings, created for his guidance a mole geometry, a tactile 
space, codified by Euclid ... Yet man is no mole."
 
 - Type: TRIANGULAR:
-  
On a New Property of the Tangents of 
Three Arches Trisecting the Circumference of a Circle
 by Rev. Nevil Maskelyne
[Phil. Trans. R. S. L.  98, 122  (1808)]
"Arch" meaning "angle" and "tangent" meaning "tangent line-segment".
 - 
An Elementary Treatise on Trilinear Co-ordinates,
the Method of Reciprocal Polars, and the Theory of Projections
by Rev. N. M. Ferrers
[Cambridge: Macmillan, 1861]
 - 
A Treatise on Trilinear Co-ordinates, Intended
Chiefly for the Use of Junior Students
by C. J. C. Price
[Oxford: Henry and Parker, 1866]
 - 
Trilinear Coordinates and Other Methods
of Modern Analytical Geometry of Two Dimensions
by Rev. Wm. Allen Whitworth
[Cambridge: Deighton, Bell, 1866]
 - 
Notes on the Geometry of the Plane Triangle
by John Griffiths
[Oxford: Jas. Parker, 1867]
 - 
Tracts Relating to the Modern Higher Mathematics: Trilinear Coordinates
by Rev. W. J. Wright
[London: Hodgson, 1875]
 - 
A Treatise on the Analytical Geometry of the Point, Line, 
Circle, and Conic Sections
by John Casey
[Dublin: Hodges and Figgis, 1885]
 - 
The Modern Geometry of the Triangle
by Wm. Gallatly
[London: Hodgson, 1910]
 
 - Aspects: FOUNDATIONS:
 - Aspects: MECHANICAL DEVICES:
 - Aspects: CIRCLE SQUARING: