| 单词 | Canada balsam |
| 例句 | Owing to their want of adhesiveness, they are, however, usually mounted on glass as microscopic slides, either in glycerin jelly, Canada balsam or some other suitable medium. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 3 "Helmont, Jean" to "Hernosand" 2012-04-14T02:00:23.707Z The wings are then thoroughly washed in pure water and may be gummed to cards or mounted on glass slides in Canada balsam, first washing them in alcohol and chloroform to remove the moisture. Directions for Collecting and Preserving Insects 2012-03-28T02:00:31.483Z If the preparation is to be permanently preserved, it should be dehydrated in strong alcohol after washing with water, and it may then be treated with oil of cloves and mounted in Canada balsam. A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases 2012-03-17T02:00:54.097Z The former was photography spoiled by the application of Canada balsam and very little art; the latter was the application of a great deal of art to spoil a photograph. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z Crystallites may also be produced by allowing a solution of sulphur in carbon disulphide mixed with Canada balsam to evaporate slowly, and their development may be watched on a microscopic slide. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z Maxwell found that a quantity of Canada balsam, if stirred, acquired double-refracting powers, which it retained for a short period, until the stress temporarily induced had disappeared. Heroes of Science: Physicists 2012-01-17T03:00:17Z The wing is removed and mounted upon a slide in Canada balsam, which should be preferably rather thick. Directions for Collecting and Preserving Insects 2012-03-28T02:00:31.483Z The balsam fir is probably best known as the typical Christmas tree of the Northeastern states and the source of Canada balsam, used in laboratories and in medicine. Trees Worth Knowing 2011-10-13T02:00:48.357Z The plates may be pressed together or clamped together and placed over the middle neck of the bottle, a close contact being made with Canada balsam. Paint Technology and Tests 2011-09-15T02:00:12.263Z The statoblasts mounted in Canada balsam by Carter and now in the British Museum must be regarded as the types of the species named but not seen by Hyatt. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z It is frequently adulterated for market.—The balm of Gilead fir, which produces a turpentine called Canada balsam, is the Abies balsamifĕra, a North American species, whose range is from Virginia to Canada. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis Canada balsam and crude turpentine are familiar examples of the first class. The Chemistry of Plant Life Quicklime mixed with white of egg, hardened Canada balsam, and thick copal or mastic varnish are also useful for cementing broken china, which should be warmed before their application. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" Again, when a film of Canada balsam is enclosed between glass plates, the disappearance during a few weeks of small air bubbles enclosed in the balsam can be watched under the microscope. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" Clear with oil of cloves and mount in Canada balsam. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z A varnish formed of Canada balsam, dissolved in turpentine, supplies a most valuable means of making paper transparent. Paper and Printing Recipes A Handy Volume of Practical Recipes, Concerning the Every-Day Business of Stationers, Printers, Binders, and the Kindred Trades Flexible collodion, containing Canada balsam and castor oil, does not crack, but, on the other hand, does not contract. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" Some photographers prefer, instead of using wax, to apply a solution of Canada balsam in spirits of turpentine. Notes and Queries, Number 216, December 17, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc Mix together two ounces of spirits of turpentine, and one ounce of Canada balsam. The Cook and Housekeeper's Complete and Universal Dictionary; Including a System of Modern Cookery, in all Its Various Branches, Adapted to the Use of Private Families They may then be picked up with a camel's-hair brush and mounted in Canada balsam. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z After immersion therein for a week or so, even the cover-slips mounted with Canada balsam can be readily detached from their slides. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Canada balsam or Canada turpentine is the oleo-resin yielded by Abies balsamea, a tree that grows in Canada and the northern parts of the United States. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" Canada balsam, thus obtained, is a clear liquid from a fir tree of the same name. Conservation Reader Cement for Glass Baths.—The best I have tried is Canada balsam. Notes and Queries, Number 208, October 22, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc To examine the skeleton of a Spongillid.—Cut thin hand-sections with a sharp scalpel, dehydrate if necessary, and mount in Canada balsam. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Examine in water; if satisfactory, dry and mount in Canada balsam. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. We have found no way to improve on Nature in this respect, for to-day when we desire to mount a specimen permanently for microscopical work, we imbed it in Canada balsam. The Log of the Sun A Chronicle of Nature's Year They are left in it from thirty minutes to an hour, then withdrawn, and placed in alcohol, after which they can be made transparent with essence of terebinth and mounted in Canada balsam. Practical Taxidermy A manual of instruction to the amateur in collecting, preserving, and setting up natural history specimens of all kinds. To which is added a chapter upon the pictorial arrangement of museums. With additional instructions in modelling and artistic taxidermy. This succeeded perfectly by making the varnish out of Canada balsam stained with a black aniline dye. On Laboratory Arts Take unsized paper and apply a coat of varnish made of equal parts of Canada balsam and oil of turpentine. Practical Mechanics for Boys Note.—Xylol is used in preference to chloroform to dissolve Canada balsam, as it does not decolourise the specimen. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Immersion, in glycerine will render it more transparent; or it may be cleared with oil of cloves, put up temporarily in that, or permanently in Canada balsam. Text Book of Biology, Part 1: Vertebrata The preparation should then be sealed with Canada balsam or some other cement, but previously all trace of glycerine must be removed from the slide and upper surface of the cover glass. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses A very loose rock is best boiled in Canada balsam, hard enough to set, before it is put against the wheel. On Laboratory Arts Lastly, the minerals are mounted on glass, with or without covers, by means of Canada balsam. Scientific American, Volume XXXVI., No. 8, February 24, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. Outside: painted maroon, highly varnished with Canada balsam: the panels picked out with dark blue. First Impressions of the New World On Two Travellers from the Old in the Autumn of 1858 Canada balsam and 2 oz. spirits of turpentine. French Polishing and Enamelling A Practical Work of Instruction Glycerine mounts must be closed, which may be done with Canada balsam as already described. Elements of Structural and Systematic Botany For High Schools and Elementary College Courses The art of preparing Canada balsam appears to consist in heating it under such conditions as will ensure its being exposed in thin layers. On Laboratory Arts Besides these there are Venice turpentine from the larch, Pinus Larix, Strassburg turpentine from Abies pectinata, and Canada balsam from Pinus balsamea. Scientific American Supplement, No. 711, August 17, 1889 The surfaces of this section, after having been carefully polished, are cemented together again by means of Canada balsam. Scientific American Supplement, No. 441, June 14, 1884. I dare say it will bear preservation in Canada balsam. Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries Canada balsam may be substituted for balsam of copaiba where the smell of the latter is objectionable, but the ink then dries very quickly. Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 It also seems not improbable that a proper overhaul of available gums and cements would be found to lead to a cementing material less troublesome than Canada balsam. On Laboratory Arts When the drawing was made I placed on the drawing a drop of Canada balsam, and covered it with a circle of thin glass, just like any other microscopic mounted object. Scientific American Supplement, No. 470, January 3, 1885 Now the refractive index of Iceland spar is, for the extraordinary ray less, and for the ordinary greater, than for Canada balsam. Six Lectures on Light Delivered In The United States In 1872-1873 The substances used to preserve the tissues are Canada balsam, Dammar balsam, glycerine, Farrant's solution, potassium acetate, spirits, naphtha, and creosote. Scientific American Supplement, No. 492, June 6, 1885 The deep-green bark, striped with gray, is full of balsam, or resin, known as balm of Gilead or Canada balsam, and highly valued as a cure for diseases of the lungs. Among the Trees at Elmridge The temperature must not rise so high as to cause any visible change in the Canada balsam, except a slight formation of bubbles, which rise to the surface, and can be blown off. On Laboratory Arts When the vesicles of the substance are filled with Canada balsam, and a thin slice is cut from it, this opalescence comes out in the most striking manner. Scientific American Supplement, No. 595, May 28, 1887 Let this rhomb be cut along the plane b c; and the two severed surfaces, after having been polished, reunited by Canada balsam. Six Lectures on Light Delivered In The United States In 1872-1873 Dammar is now used as a substitute for Canada balsam. Scientific American Supplement, No. 492, June 6, 1885 Cementing the transparency to a piece of plain, clear glass with Canada balsam, as suggested by Mr. Woodworth, I found in practice to be open to two formidable objections. Scientific American Supplement, No. 288, July 9, 1881 Take of Canada balsam 3 drachms; gum sandric 3 drachms; spirits of wine 1/2 pint. Young's Demonstrative Translation of Scientific Secrets They seem in fact to be the portions of the mass which the fluid Canada balsam has not succeeded in penetrating. Scientific American Supplement, No. 595, May 28, 1887 I have hit, however, upon another way of utilizing Canada balsam, which, while retaining all the good qualities of the former method, is not subject to any of its disadvantages. Scientific American Supplement, No. 288, July 9, 1881 Mix together 1 oz. of Canada balsam and 2 ozs. of spirits of turpentine. Young's Demonstrative Translation of Scientific Secrets |
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