Barbarashm left a comment on an earlier post here. it turns out I had activated a function called "Comment Moderation" or some such, which means - I learn - that comments don't even appear untill after I've vetted them. I suppose if a blog is getting hate-filled rants the blogger might want such a function - but then again, perhaps not. Hate-filled rants tend to look like what they are, and sometimes the most effective way to combat them is to let them stand in the fill glare of sunlight.
Anyway, this blog is ulikely to get there, what with its 4 readers so far. So I've disabled the "Comment Moderation" function, which probably means that readers can post their comments without waiting for my permission. And should I ever find myself writting a popular blog, I certainly don't see where I'd find the time to moderate all the comments.