The sectorian system of handrailing
Subtitle: ... elucidating the whole subject by the introduction of fifteen plates, with suitable letter-press notes on each plate.  The principle is entirely new, and adapted to the construction of wreaths for stairs, however difficult, by the use of the sector, a mathematical instrument founded on the fourth proposition of the sixth book of Euclid, and adapted to this system.
By: By William Forbes.
Publisher: Printed at Gary's steam printing house]
Published: 1873
Place of publication: [Richmond, Va
Language: eng
Number of pages: 16
Subjects: Hand-railing.