Thanks.  I do not have a problem with temperature fluctuations, but only with the humidity.   I think that the early drop to 26 degrees one night stopped the developement of all but possibly 4 eggs.  There was nothing when I candeled them at about 10 days or so. 
The four that seemed possible to hatch did ndot, but I did not think they would.  I was going to crack the eggs before thowing away, but was not up to it. 
I will keep trying.  I would like to replenish my flock of Salmon Faverolles.  But it may be a good idea to buy some from a different hatchery for different genes.