You can use your mercury people thermometer. Any thermometer will do. Remember err on the side of to cool not to hot. Place a light over the eggs and put them on a warm damp ( not wet towel or cloth) place them any place that is warm while you set up your temporary hatching place. A box of any kind to help keep drafts off. You can use an electric skillet lay down a thick base of shavings or sand best if you have one with a vent on top. I would not use a toaster oven. The hanging light you would use in your brooder should work fine. I have heard of people using their electric blanket as well but the clamp light 75 to 100 watts placed high enough to get the temperature you need. Good Luck.