NOTE. 
With this double Part of Biometrika is issued an Appendix containing the 
Records of the late W. F. R. Weldon's Mice Breeding Experiments. It was 
intended originally to issue these Records as an Appendix to the memoir in which 
the reduced observations are discussed. While the reductions have made con- 
siderable progress there has been unfortunately great delay in their completion 
owing to Assistants to whom they were entrusted being called away for other 
work, and owing to the whole Laboratory Staff for the past twelve months having 
other duties. As the present Records were set up more than two years ago, it is 
convenient to issue them at once, in anticipation of the explanatory memoir, 
which, it is hoped, will not be too long delayed. The determinations of colour 
and extent of pigmentation from the scales are due to F. J. W. upon whom 
also the more laborious part of the preparation for press of these Records has 
fallen. K. P. 
