magnesiumn.

1781 J. Black Let. 23 Apr. in E. Robinson & D. McKie Partners in Sci. (1970) 111 The Swedish Chemists..have got a Metal from it [sc. Manganese], they call it Magnesium.

1784 E. Cullen tr. T. Bergman Physical & Chem. Ess. II. 202 It is many years since I began to suspect that some metal, different from all those formerly known, lay concealed in magnesium [L. in Magnesia nigra].

1808 H. Davy in Philos. Trans. (Royal Soc.) 98 346 I shall venture to denominate the metals from the alkaline earths barium, strontium, calcium, and magnium: the last of these words is undoubtedly objectionable, but magnesium has been already applied to metallic manganese.

1823 G. Crabb Universal Technol. Dict. II. Magnesium, in English Manganese; a fossil ferruginous metallic substance.

1812 H. Davy Elements Chem. Philos. 352 That magnesia consists of magnesium and oxygene, is proved both by analysis and synthesis.

1841 W. T. Brande Man. Chem. (ed. 5) 705 .

1881 N. Lockyer in Nature No. 617. 394 The spectra are as distinct as the spectrum of magnesium.

1907 G. S. Newth Text-bk. Inorg. Chem. (ed. 12) 573 Magnesium is a silvery-white metal, which does not tarnish in dry air, but becomes coated with a film of oxide when exposed to air and moisture.

1971 D. Francis Bonecrack xiv. 175 The hatred flared up like magnesium and his voice rose half an octave.

1860 Photogr. News 8 June 70/2 A rival..to the strong lights hitherto used is like to spring up in Bunsen's magnesium-lamp.

1871 M. Collins Marquis & Merchant I. vi. 204 A magnesium lamp stood on the table.

1890 W. E. Woodbury Encycl. Photogr. 373 The electric lamp, magnesium lamp, and flash lamp.

1860 Photogr. News 8 June 70/2 The excellence of the magnesium-light.

1871 C. Kingsley At Last I. vi. 219 My host,..by the help of the magnesium light, had penetrated further into the cave.

1904 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 372/1 Magnesium light, an artificial light produced by burning magnesium powder or ribbon.

1890 Internat. Ann. Anthonys Photogr. Bull. 126 Magnesium ribbon.

1940 G. H. J. Adlam & L. S. Price Higher School Certificate Inorg. Chem. (ed. 2) xxxv. 278 If aluminium powder..is mixed with ferric oxide..and the mixture ignited by magnesium ribbon, aluminium oxide is formed and so much heat is given out that the other metal melts.

1969 Focal Encycl. Photogr. (rev. ed.) 909/1 The exposure required for magnesium ribbon depends upon the weight of magnesium burned.

1982 G. C. Hill & J. S. Holman Chem. in Context: Lab. Man. & Study Guide 58/2 Repeat the test using magnesium ribbon in place of aluminium turnings.

1860 Photogr. News 8 June 70/2 Notwithstanding the high price of the magnesium thread.

1865 Proc. Amer. Philos. Soc. 1862–4 9 458 Magnesium wire.

1878 H. S. Wilson Alpine Ascents iii. 94 The intense flame of the magnesium wire.

1889 Harper's Mag. Aug. 365/1 The burning of magnesium wire and the electric light furnished sufficient illumination under full control.

1871 H. E. Roscoe Lessons Elem. Chem. (new ed.) xxi. 229 Magnesium Carbonate, MgCO₃, is an insoluble compound, occurring as a crystallised mineral termed magnesite. The magnesia alba of the shops is a varying mixture of carbonate and hydrate.

1904 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 371/1 Magnesium carbonate..occurs naturally as magnesite.

1951 R. Mayer Artist's Handbk. (new ed.) ii. 54 Magnesium carbonate, artificially made. Probably the very whitest inert pigment.

1990 Globe & Mail (Toronto) 3 Jan. c9/4 Another process, named Wei T'o after the ancient Chinese god believed to protect books, uses an organic magnesium carbonate suspended in a gaseous solution.

1866 H. E. Roscoe Lessons Elem. Chem. xxi. 185 Magnesium chloride, MgCl₂, a fusible salt obtained by heating a solution of magnesia in hydrochloric acid with an equal quantity of sal-ammoniac.

1876 Encycl. Brit. V. 527/1 Magnesium and zinc chlorides are extremely soluble in water.

1968 New Eng. Jrnl. Med. 14 Mar. 576/2 In a tris-buffered isotonic magnesium chloride solution, the sodium efflux was 26.0 mEq per liter of cells per hour.

1993 Co-op Connection (La Montanita, New Mexico) Jan. 8/2 Tofu..is made by grinding soaked soybeans, boiling the ground beans with water and straining to make soymilk. The milk is then cooked with solidifiers like nigari (the mineral salts remaining when sea water is evaporated), calcium sulfate, magnesium chloride, lemon juice or vinegar.

1866 H. E. Roscoe Lessons Elem. Chem. xxi. 185 Magnesium Oxide, or Magnesia, MgO.

1914 J. W. Mellor Introd. Mod. Inorg. Chem. xx. 368 Magnesium oxide is made from magnesium chloride of the Stassfurt deposits by converting the latter into the carbonate and calcining the resulting carbonate.

1998 Computers Today 15 Dec. The BUS electrodes (CrCuCr) are then patterned, a dielectric layer screen-printed and a final protective layer of Magnesium Oxide evaporated on.

1871 H. E. Roscoe Lessons Elem. Chem. (new ed.) xxi. 229 Magnesium sulphate, MgS0₄ + 7H₂O: this is a soluble substance known as Epsom Salts...magnesium sulphate forms, with the alkaline sulphates, double Salts.

1938 R. Hum Chem. for Engin. Students xiv. 324 Another method of employing finely divided platinum is to support it upon ‘masses’ of anhydrous magnesium sulphate, instead of asbestos, placed upon perforated shelves in the converter. This is known as the Grillo method.

1991 Garden (Royal Hort. Soc.) Mar. 113/2 Regular irrigation was given throughout the growing season, with three supplementary foliar feeds of magnesium sulphate applied at weekly intervals.

1936 Brit. Med. Jrnl. 1 Feb. 205/2 Pepsin disappears quickly from solution after the addition of magnesium trisilicate.

1940 E. Browning Mod. Drugs in Gen. Practice viii. 178 The new remedies, among which may be specially mentioned aluminium hydroxide and magnesium trisilicate, have an acidity-neutralising action equal to that of the old alkalies, but do not diminish the alkali reserve.

1974 M. C. Gerald Pharmacol. xiii. 258 The absorbents are by far the most commonly employed constituents in nonprescription antidiarrheal products and include..bismuth subcarbonate, magnesium trisilicate, [etc.].

1985 M. F. Myles Textbk. Midwives (ed. 10) xviii. 289 To counteract the acidity of the gastric contents most obstetricians prescribe magnesium trisilicate, 15ml two hourly throughout labour.