condensing gear, and produce a considerable yield of oil, for which,
however, there is a very limited market, the chief use being for
lucigen and other lamps of the same description, and for pickling
timber for railway sleepers, etc.; the result being that, four years
ago, it could be obtained in any quantity at 1/2d. per gallon, while
since that it has been as high as 21/2d. a gallon, but is now about 2d.,
and shows a falling tendency. Make a market for this product, and the
supply will be practically unlimited, as every blast furnace and coke
oven in the kingdom will put up plant for the recovery of the oil, and
as with the limited plant now at work it would be perfectly easy to
obtain 4,000,000 or 5,000,000 gallons per annum, an extension of the
recovery process would mean a supply sufficiently large to meet all
demands.

Many gas managers have, from time to time, tried if they could not use
some of their creosote for gas producing, but on heating it in
retorts, etc., they have found the result has generally been a copious
deposit of carbon, and a gas which has possessed little or no
illuminating value. Now, the furnace and coke oven oils are in
composition somewhat akin to the creosote oil, so that at first sight
it does not seem a hopeful field for search after a good carbureter,
but the furnace oils have several points in which they differ from the
coal tar products. In the first place, they contain a certain
percentage of paraffin oil, and in the next, do not contain much
naphthalene, in which the coal tar oil is especially rich, and which
would be a distinct drawback to their use.

The furnace oil as condensed contains about 30 to 50 per cent. of
water, and in any case this has to be removed by distilling; and Mr.
Staveley has patented a process by which the distillation is continued