Objects are created with the make-object procedure:
(make-object class init-param
... init-param 
)
The values of init-param ...init-param are
passed as initialization arguments.
All instance variables are initially bound to the special value #<undefined>. After values are assigned to the initialization arguments, the initial value expression for each instance variable is evaluated.
Among the instance variable initial value expressions and
sequence clause expressions, each superclass's instance
variables must be initialized (once) by calling
superclass-name-init:
(superclass-name-init super-init-param
...super-init-param 
)
When using the single-inheritance form class, then the superclass initialization procedure is named super-init.
Instance variables inherited from a superclass will not be initialized until the superclass's initialization procedure is invoked. It is an error to reach the end of initialization without invoking all of the (non-null) superclasses initialization procedures; the exn:object:init:never exception is raised in this case. If a superclass initialization procedure is called more than once, the exn:object:init:multi exception is raised.