On Oct 29, 2014, at 12:21 PM, Phil Pugliese (via tml list) <xxxxxx@simplelists.com> wrote:

> I do recall reading a semi auto-biography where the author stated that sailing ships carried cargo right up to WWII & were only eliminated by the large numbers of cheap surplus Liberty ships that became avail afterwards.

Sail power is also free. Engines cost in both maintenance and fuel. When you’re scraping by very close to the margins, this can make the difference. As we head towards peak oil and beyond, this will become increasingly important. The need for improved fuel economy, for example has been the biggest driving force in commercial aviation development for decades now.

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Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs