Chapman, J.G. (John Gadsby), 1808-1889. / The American drawing-book: a manual for the amateur, and basis of study for the professional artist: especially adapted to the use of public and private schools, as well as home instruction.
(1870 [1873 printing])
Chapter V. Elements of geometry, pp. 113-124
EFORE entering U~0fl the study ol Perspective, some degree of prepara- - knowledge of the first principles of Geometry is requisite, especially of such as relate to the construction of the most important mathematical fig- tires and forms: in the acquirement of / which the student will necessarily be made familiar with the use of certain instruments, which will be found greatly to facilitate his practical operations, and, to which, although it may not be absolutely necessary to have constant recourse, still, the surest way of learning to do without them is first to acquire a practical knowledge of their use and value. Although, all the rules and principles of Perspective are~ in truth, based upon and connected with Geometry, it will be sufficient that the artist and off-hand draughtsman should understand so much of that science as may be immediately connected with his art, without entering into the more laborious investigation of causes and effects, however interesting and productive of mental strength may he its further pursuit. It will, therefore, be only necessary to present a short chapter on this 15 118 N) I / j // / C I
Based on date of publication, this material is presumed to be in the public domain.| For information on re-use, see http://digital.library.wisc.edu/1711.dl/Copyright