ole
available room space is worth fifty per cent more, and 7/10
correspondingly less than the average price of $3.65 per foot.
Therefore, $3.65 x 1-1/2 = $5.47 = price of corner-suites per foot,
3/10 x the total area 169,296 square feet = 50,788 square feet x $5.47
= $277,810, which, deducted from $617,771, leaves $339,961 to
represent the total cost of the remaining 7/10. The total area 169,296
x 7/10 = 118,507 square feet of available space in the inner-suites.
Hence $339,961/118,507 = $2.86 as the price per square foot of the
inner-suites, or all suites which are not corner-suites.

Now, as our estimates on the "tower" were made on the basis of its
being an inner building in a block and not a corner-house, our
estimates for the "flat" should be on a basis of $2.86, instead of
$3.65, as taken. Therefore, our suite of 4,859 square feet would be
but $13,896 if the "flat" were any other than a corner one, and if the
public kitchen and cafe were used, it would be $11,242, or _but a
little more than a quarter of that of the "tower!"_

The foregoing figures are easily explained, and their correctness
verified by the following simple diagrams and considerations:

[Illustration: Figure 2.]

In Figure 2 the shaded parts of the plans represent the unavailable
room which, under the apartment-house system, are rendered
unnecessary, and they are practically wasted. Thus the eighty
families, by uniting their eighty homes in one cooeperative apartment,
save 156 staircases consisting of seventy-six front and eighty back
staircases, seventy-eight furnaces, seventy-nine laundries, etc., and
nearly all the space they occupy, and the land, foundation and roof
they represent.

[Illustration: Figure 3.]

This waste space may be graphically shown by the diagrams in Figure 3.
The large black-and-white line represents the "tower," and the shorter
the "flat." The black part of each line denotes unavailable, and the
white part available room, the sum of the two denoting the total
cubical contents of each dwelling. The white parts of the lines
measure the same length in each case, because the amount of available
room in "tower" and "flat" is assumed at the outset to be the same.
Thus in the "tower," the front and back staircases and halls take up
22,000 cubic feet out of the total 106,000 cubic feet covered by the
entire building. In the "flat" the proportional part of the halls and
staircases for each suite is represented by a comparati