relight his cigar over the lamp; `that . . . very clear indeed.' side of that idea. You have all heard what they have to say `It is simply this. That Space, as our mathematicians have it, is spoken of as having three dimensions, which one may call reference to three planes, each at right angles to the others. You know how on a flat surface, which has only two dimensions,
ไม่มีความคิดเห็น:
แสดงความคิดเห็น