[plt-scheme] Using Scheme_Object * from another thread

Joe Marshall writes: 

> karczma at info.unicaen.fr writes:
...
>>> What's Matthew's $0.02?
>>
>> Exactly. I checked the Bible. Nothing. It seems that they never used
>> dollars there. Jerzy Karczmarczuk
> 
> The Bible seems to use a 1-based numbering system, unlike MzScheme, so
> the equivalent verse should be 1.3: 
> 
>   1:3 And Judas begat Phares and Zara of Thamar; and Phares begat
>       Esrom; and Esrom begat Aram;  
> 
> (King James version) 
> 
> Does this help?

Yes! Thank you. 

Eerrr... 

Do you think that with some tail optimization it would be possible
to implement recursive begetting? 

Jerzy Karczmarczuk