A correspondent writing to us from Fall River, Conn., states that a burning fluid called "Helion Oil," has recently come into extensive use in that city, a)1d he asks if it is one of those fluids liable to explosions, which we described lately in an article in our columns. We have had other inquiries of a similar character relating to a fluid called "Excelsior Oil." Not having seen the oils which have received such names, we cannot tell what they are, but we suppose they are coal oils with flashy names to astonish the marines. All such fluids should receive their true name in connection with that of the manufacturers, such as "Breckenridge Coal Oil, " "Newark (Ohio) Coal Oil," &c. The quality of the oil will thus become an advertisement to the manufacturers, and incite them to make improvements, in order to excel one another in producing the best and cheapest article.