Population of O'Neill cylinder

I do believe that your book has a typo. The 4 mile diameter one is the
island 3 types. The island 4 type was one where the dimensions were
multiple by 4 (16 mi diam, 80 mi long), although I'm presently
wondering if the population figure of 10 million was for that one or
not. The island 4 was the largest one that could be envisioned by
O'neil with the available materials.

The agriculture for the colonies was always envisioned as being done
externally. The pictures shown are more for illustration and not
reality. The best way to approach agriculture would be small cylinders
(say 100 m by 50 m) and have large number of them (10 000 or more).
This will allow the variety in seasons (think fresh strawberries year
round because they are in season) and in climate (coconuts and mangoes
from one unit and broccilli and cauliflower from another.

Although people may survive without red meat there is merit to have
certain animals in space. For example dairy cows or goats for milk,
rabbit and guinea pigs for meat fed on the agricultural waste.
Remember that most plants only produce a small percentage of its mass
as human edible food and many of the farm animals we presently feed
grain and corn too started off life as scavengers feeding off the
agricultural waste humans couldn't eat.

> I think some typos and general confusion might be at the route of
all this.
>
> A cylinder 6.5km wide and 32km long has a an internal area of
~250miles^2 or
> 650km^2 but not 400km^2 (windows or not) as the Space Settlement FAQ
says.
> ;)
> My book identifies this design as being island 4.
> Yonder website calls it an model 3:
http://www.l5news.org/oneillcylinder.htm