In fact, the moment when this shadow would reach its minimum of length would be exactly twelve o'clock, and it would be enough to watch the extremity of the shadow, so as to ascertain the instant when, after having successively diminished, it began to lengthen.
En efecto, cuando aquella sombra llegase al mínimun de su longitud, sería el mediodía preciso, y bastaría seguir el extremo de aquella sombra para reconocer el instante en que, después de haber disminuido sucesivamente, comenzara a prolongarse.