I have made up some spreadsheets to work out egg weight loss during artificial incubation. As you can see from my pages, I keep a variety of birds. If you have had dissapointments with an Incubator, this will work it out. It is for Microsoft Excel,  and all you do is enter the fresh weight of the egg, the date it is due to hatch, this will then calculate what weight the egg should be at each day till it is ready to be transfered to the hatcher. I have given copies to friends, and sold some on e bay uk, all with 100% positive feedback. If you would like to know about these sheets, which I was sending out complete with Incubation instructions and reference sources, please e-mail me. They follow the weight loss system used by Rob Harvey, Arthur Anderson-Brown and Denis Charles Deeming. They also work out a correction factor for Hoyt's theory of initial egg mass. With space to record actual daily weight, humidity and a temperature calculator for Fahrenheit and Celsius.