, or twelve cubic
feet of hydrogen, therefore, from four to six ounces of turpentine
should have been used up, supposing it to be all carbon; but turpentine
is composed of twenty atoms of carbon to fifteen atoms of hydrogen, and,
consequently, only one-seventh of its carbon can be taken up by the
hydrogen; or, in other words, forty-two ounces of turpentine will be
required to carburet one ounce of hydrogen." He tried the experiment
afterward, placing the whole apparatus in a cold bath to prevent
evaporation, and again by heating the turpentine to 120 degrees--but in
both cases with the same result. He used the same turpentine and had a
brilliant light for nearly three hours, and yet the quantity was not
perceptibly diminished. Mr. Mathiot claims that his experiments prove
conclusively that hydrogen can be used for illumination, but at what
comparative rate of expense he does not state.--The American Scientific
Association commenced its annual session at New Haven on the 19th of
August. This is an association formed for the advancement of science and
embraces within its members nearly all the leading scientific men of the
United States. Prof. BACHE presides. The proceedings of these
conventions, made up of papers on scientific subjects read by
distinguished gentlemen, are published in a volume, and form a valuable
contribution to American scientific literature.--Intelligence has been
received, by way of England, and also, direct, from two of the American
vessels sent out in search of Sir John Franklin. The brig _Advance_
arrived at Whalefish Island, on the West Coast of Greenland, on the 24th
of June, and the _Rescue_ arrived two days after. Two of the British
steamers and two of the ships had also arrived. All on board were well,
and in good spirits for prosecuting the expedition. Enormous icebergs
were, seen by the American vessels on the voyage, some of them rising
150 or 200 feet above the water. A letter from an officer of the
_Rescue_ says they expected to go to a place called Uppermarik, about
two hundred miles from Whalefish Island, thence to Melville Bay, and
across Lancaster Sound to Cape Walker, and from that point they would
try to go to Melville Island and as much farther as possible. They
intended to winter at Melville Island, but that would depend upon
circumstances.

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The LITERARY INTELLIGENCE of the month presents no feature of special
interest. The first volume