 | Science - 1875 - 540 pages
...the manner in which the sound is produced. As the grains of sand, although small, are quite opaqne, it was necessary to prepare them so that they should...visible. This was effected by fastening them to a glags slide and grinding them down until one flat surface was obtained. This surface was then attached... | |
 | James Samuelson, Henry Lawson, William Sweetland Dallas - Science - 1876 - 486 pages
...published in the last number of the " Proceedings of the California Academy of Sciences " (voL v). lie states that " in order to ascertain, if possible,...again ground down until sufficiently transparent. The prams were found to be chiefly composed of small portions of coral and apparently calcareous sponges,... | |
 | Science - 1877 - 388 pages
...Nature. Musical Sand. — Mr. Frink states, in the " Proceedings of the California Academy of Sciences," that in order to ascertain, if possible, "the cause...This was effected by fastening them to a glass slide, aud grinding them down until one flat surface was obtained. This surface was then attached to another... | |
 | Spencer Fullerton Baird - Industrial arts - 1877 - 874 pages
...ascertained fully explain the manner in which the sound is produced. As the grains of sand, though small, are quite opaque, it was necessary to prepare...grinding them down until one flat surface was obtained. The grains were found to be chiefly composed of portions of small coral and apparently calcareous sponges,... | |
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(voL v). lie states that " in order to ascertain, if possible, the cause of the sound that is produced by the sand from Kauai, presented to the Academy at a former meeting, I investigated its structure under the microscope, and I think the facts I have... 