Forty two below this morning at seven oclock and has been about the same all day. It has been dark and frosty since about nine oclock this morning, can only see a few stars overhead now, and they are dim. I made another ground glass for Borup. He broke the last one today. They are for his Camera for focusing. Groved [sic] a couple of covers, and drilled a few holes in the ice melting machine and cooker.