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 the moisture was expelled from it. On using this oil, without any drier, it was found to dry in one-half the usual time. He then mixed with it some siccohast, using only half the usual quantity employed to dry oil not boiled, and obtained similar results. "The introduction," says he, "of steam into the linseed before grinding aids in the expulsion of the oil; but it must stand a long time to precipitate the water completely. Boiling oil by steam does not change its complexion, save that it renders it clearer, and less liable to turn yellow with white pigments."

Results of the Polaris Voyage.—The following is from Dr. Bessel's memoranda of the discoveries of the expedition:

1. The Polaris reached 82° 16' north, a higher latitude than has been attained by any other ship. Captain Buddington's testimony is very definite as to the impracticability of pushing a vessel farther north than the point which they reached.

2. The navigability of Kennedy Channel has been proved beyond a doubt.

3. Upward of 700 miles of coast-line have been discovered and surveyed.

4. The insularity of Greenland has been proved.

5. Numerous observations have been made relating to astronomy, magnetism, force of gravity, ocean physics, meteorology, zoology, ethnology, botany, and geology, the records of which were kept in accordance with the instructions supplied by the National Academy. A ninety-fathom sounding along the coast of GrinnelllGrinnell [sic]-and brought up a highly-interesting organism of lower type than the Bathybius discovered by the English Dredging Expedition. It was named Protobathybius Robesonii. The natural-history collections were nearly all lost. They consisted of mammals, nine species of fur-bearing seals; birds, twenty-one species; insects, about fifteen species, viz., one beetle, four butterflies, six diptera, one bumble-bee, and several ichneumon-flies; also two species of spiders, and several mites.

It was found that the land was rising. Garnets of unusual size were found in latitude 80° 30', having marked mineralogical characteristics by which the identity of some garnets from Fiskenaes was established. From such observations it became evident that the drift, which abounded on the land, runs from south to north.

Australian Compliment to American Microscopes.—But a short time ago, a small number of microscopists met in Melbourne, and decided to form an organization under the name "Microscopical Society of Victoria, New South Wales." The first general meeting of the Society was held in the Royal Society's Hall, October 10, 1873. About forty gentlemen were present, and a good exhibition of instruments and work was made. The president, Mr. W. H. Archer, read an address, from which we extract the following significant passage. Geologically, it is the oldest continent speaking to one the next in age; although politically it is the most recent of the peoples, speaking of science among one but a little older than themselves:

"One of the most interesting and practically useful objects for occasional investigation and discussion at our meetings will be the accurate determination of the real value to working microscopists of the various stands, objectives, and accessory apparatus so prodigally developed by makers in the mother-country. But, indeed, we should not confine ourselves to the results of English industry. Hartnack, of Paris, appears to be leading the way on the Continent to greatly-improved optical work; and Tolles, Spencer, and Wales, are said to be doing marvels in America. I hope to see the day when we shall have choice proofs of what the whole microscopical world can produce collected around us, and carefully tested by our own eyes and hands, in our own hall in Melbourne. One other thing, gentlemen, you as well as I should be rejoiced to see, and that is a really useful microscope of Victorian manufacture. At present, the idea is naturally provocative of a smile, but I cling to the belief that not only among the adult immigrant population, but even among our native-born youth, we shall some day find thorough mechanicians, who will emulate the marvelous skill and persistent energy of their forefathers. Look at the triumphs of the American microscope-makers. Their conquests are literally tut of yesterday and of to-day. A generation ago