[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Architecture and art](https://indike.org/pramana/ins.art) › [Essay on the Architecture of the Hindus](https://indike.org/pramana/ins.art.raz-1834) › c4.57 # Essay on the Architecture of the Hindus c4.57 Essay on the Architecture of the Hindus c4.57 - **Language:** English ### [c4.57](https://indike.org/pramana/ins.art.raz-1834.c4.57) "Having marked," says the commentary, "a point in the middle of a level piece of ground, from that point, and with a radius equal to the length of the shadow projected at the third \*ghatica\* after the sun's rise, plus half of the diameter of the gnomon (because the shadow is measured from the circumference of the gnomon), let a circle be described, and in the centre of it let a \*sanc'hu\* be erected, of twelve \*angulas\* in height and of the same diameter: mark points where the shadow falls before and after noon on the east and west of the circumference; then having computed the sines of the declination three \*ghaticas\* after sun-rise, and three \*ghaticas\* before sun-set, multiply the difference between these two sines by the hypothenuse of the shadow at the third \*ghatica\* after sun-rise, and the product being divided by the cosine of the latitude of the place, the quotient will give the \*angulas\* or their integral parts. Then remove the eastern point so many \*angulas\*, &c. according as the sun is in the south or north latitude; by this means all the points of the compass may be rectified.” - [Previous: c4.56](https://indike.org/pramana/ins.art.raz-1834.c4.56) - [Next: c4.58](https://indike.org/pramana/ins.art.raz-1834.c4.58) - [Up: c4](https://indike.org/pramana/ins.art.raz-1834.c4) --- Source: [https://indike.org/pramana/ins.art.raz-1834.c4.57](https://indike.org/pramana/ins.art.raz-1834.c4.57) · Pramāṇa