Proceedings of the American Association for the Advancement of Science (Volume 25)

This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1877. Not illustrated. Excerpt: ... On The Chemical Composition Of A Saline Efflorescence OcCurring At Goat Island. By Edw. W. Morley, of Hudson, Ohio. This efflorescence occurs on small shelves and other projections of rock at the base of the precipice between the American and Canadian Falls. These shelves are tolerably well protected from rain by the over-hanging rock above them. The quantity of the efflorescence is small: only two grammes were obtained for examination. It was grayish white, pulverulent, yielded water in the closed tube, was two-thirds soluble in water, and nine-tenths soluble in dilute acids. The insoluble residue had the appearance, under the microscope, of fine splinters and worn grains of quartz. There were determined in one portion; the water given off over sulphuric acid, at 110 degrees Centigrade, and at 170 degrees; the part soluble in water, that insoluble in acids, and that soluble in acids by difference; all the acids and bases of the part soluble in .water; and the bases of the part soluble in acids; the determination of the acids of this part was lost by accident. The part soluble in water consists of calcium and magnesium sulphates, with a small quantity of potassium and sodium sulphates. The atoms of calcium and magnesium are in the ratio of 81 and 100. The result of the analysis of the efflorescence is as follows: TITLES OF OTHER PAPERS READ IN THE PERMANENT SUBSECTION OF CHEMISTRY * On The Limit Of Reliability In The Indirect Estimation or Sodium And Potassium Chlorides. By H. W. Wiley, of Lafayette, Ind. Some Modified Forms Of Apparatus, (a) Flue With Artificial Draft, (b) Flue With Artificial Draft And Air Bath, (c) Apparatus For Sugar And Fat Extraction. By H. W. Wiley, of Lafayette, Ind. Some Indigenous Woods Of Indiana. Their Specific Gravity, Per Cent, Of ...