Mathematicians know pi, 

the ratio of the circumference of a circle to its diameter:


The wine industry knows WinePi, 

the number of gallons of wine in a case:



This is the home site for Mike Von der Porten,

the WinePi Guy.


Links to pages...

Edward P. Von der Porten 1933-2018

California State Parks Special Events Permits

Analy High School 1964 - Sebastopol, California

Imperial Valley Geothermal Plant Scrapbook 1980

Southern Pacific History 1931

California Budget Graph

SCRA- Sonoma County Radio Amateurs - Short Skip history


2-meter CPVC tape measure antenna


Wine Bankruptcy Bingo






Ironstone Vineyards


Central California Traction Company


Dave & Bill Hike


Sir Francis Drake in California


Proctor Terrace Elementary School


Eric Von der Porten


Saryl Von der Porten


Club Med Ixtapa Mexico


Santa Rosa Pedestrian Parity


Ironstone's Crown Jewel


Free Snoopy


Buzzword Bingo / Bullshit Bingo


Amateur Radio Emergency Actions


Sonoma County Amateur Radio Nets


This American Life - Crackpot


SIRARC - Sons In Retirement Amateur Radio Club


Shell Oil


Bull's-Eye Chart / Arrow Chart


No License No Drive


West Virginia 2011


Russian River Community Blood Bank


Luther Burbank


Disneyland 2013