The TIF files are scans of photocopies made in the 1990s.

The PDF files are scans made in 2010.

The jpg files are the 2010 scans in a version suitable for the web.

Files with the letter "a" in the name are Morning observations.

Files with the letter "p" in the name are Afternoon observations.

Files with the letter "c" in the name show the Observor's Comments.

Files with the letter "m" in the name show Monthly Means.