this must be our excuse for entering here into what may be thought too elementary an explanation. Let us take the second point first; it may be of some assistance to remark that a sentence joined to the previous one by a coordinating conjunction is grammatically independent, as well as one not joined to it at all. But the difference between a coordinating and a subordinating conjunction is itself in English rather fine. Every one can see that 'I will not try; it is dangerous' is two independent sentences—independent in grammar, though not in thought. But it is a harder saying that 'I will not try, for it is dangerous' is also two sentences, while 'I will not try, because it is dangerous' is one only. The reason is that for coordinates, and because subordinates; instead of giving lists, which would probably be incomplete, of the two kinds of conjunction, we mention that a subordinating conjunction may be known from the other kind by its being possible to place it and its clause before the previous sentence instead of after, without destroying the sense: we can say 'Because it is dangerous, I will not try', but not 'For it is dangerous, I will not try'. This test cannot always be applied in complicated sentences; simple ones must be constructed for testing the conjunction in question.
Assuming that it is now understood (1) what a subordinating and what a coordinating conjunction is, (2) that a member joined on by no more than a coordinating conjunction is a grammatically independent sentence, or simply a sentence in the proper meaning of the word, and not a subordinate clause, we return to the first point. This was that, though independent sentences are regularly parted by at least a semicolon, there are large exceptions to the rule. These we shall only be able to indicate very loosely. There are three conditions that may favour the reduction of the semicolon to a comma: (1) Those coordinating conjunctions which are most common tend in the order of their commonness to be humble, and to recognize a comma as sufficient for their
