On a cold and sunny early winter day, Xia Huai'an arranged to meet Lame Scholar alone, and the two of them carried bamboo baskets filled with materials to a remote spot behind the mountain.
Along the way, Lame Scholar asked excitedly, "Master, what sort of novel gadget are we going to build this time?"
Xia Huai'an nodded. "Today we are going to make some mercury thermometers. Mercury is toxic, so we'll do it outdoors."
Chapter 101