The American house-carpenter : a treatise upon architecture, cornices and mouldings, framing, doors, windows, and stairs : together with the most important principles of practical geometry (1849)

Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 266

An illustration from The American house-carpenter : a treatise upon architecture, cornices and mouldings, framing, doors, windows, and stairs : together with the most important principles of practical geometry, 1849, leaf 266 — m STAIRS. … Fig. 29-t. plane of the base. This line can be proved to be the intersection of these planes in another way ; from b, through s, and from j, through ,T, draw lines meeting at m ; then the point, m, will be in the intersecting line, as is shown in the figure, and also at Fig. 293. From/, draw/p, at…

Carpentry · Architecture · Building

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$An illustration from Perspectiva horaria sive de horographia gnomonica tum theoretica, tum practica libri quatuor : in quibus gnomonices antiqui fines latius protenduntur: traditurque ratio, & delineatio geometrica expeditissima non solum communium, quae radio directo vel umbra pariter directa; sed etiam aliorum novae inventionis solarium horariorum, quae radio vel umbra tum reflexis tum refractis horas, aliaque ad coelestium motuum notitiam pertinentia indicant : in his vero praecipuam admirationem habet thaumantias catoptrica atque dioptrica, id est reflexus, ac refractusa speculo cylindrico solaris radius, omnes, qui in sphaera cogitari possunt, circulos gnomonice reddens iridis modo ac specie : lux quoque secundum propriam naturam sumpta suas ibi habet partes, ubi e principiis eius physicis ratio redditur reflexionum, ac refractionum eiusdem consequitur vero methodus certissima telescopium efficiendi non modo sphaericum sed etiam hyperbolicum atque ellipticum (1648)$
$An illustration from Perspectiva horaria sive de horographia gnomonica tum theoretica, tum practica libri quatuor : in quibus gnomonices antiqui fines latius protenduntur: traditurque ratio, & delineatio geometrica expeditissima non solum communium, quae radio directo vel umbra pariter directa; sed etiam aliorum novae inventionis solarium horariorum, quae radio vel umbra tum reflexis tum refractis horas, aliaque ad coelestium motuum notitiam pertinentia indicant : in his vero praecipuam admirationem habet thaumantias catoptrica atque dioptrica, id est reflexus, ac refractusa speculo cylindrico solaris radius, omnes, qui in sphaera cogitari possunt, circulos gnomonice reddens iridis modo ac specie : lux quoque secundum propriam naturam sumpta suas ibi habet partes, ubi e principiis eius physicis ratio redditur reflexionum, ac refractionum eiusdem consequitur vero methodus certissima telescopium efficiendi non modo sphaericum sed etiam hyperbolicum atque ellipticum (1648)$
$An illustration from Traité de la lvmiere, où sont expliquées les causes de ce qui luy arrive dans la reflexion, & dans la refraction. Et particulierement dans l'etrange refraction dv cristal d'Islande (1690)$