 ... layer, equal in depth, consisting of powdered cyanide of potassium, mixed with rather more than its bulk of dry plaster of Paris ; cover this mixture with a layer of dry plaster of Paris to the depth of a quarter of an inch or so, and pour in above...  MOTHS AND BUTTERFLIES - Page 322by MARY C. DICKERSON, B.S. - 1901Full view - About this book
 | W. Alex Muirhead - 1914 - 420 pages
...quarter of an inch or so, and pour in above the whole a layer, half an inch in depth, consisting of plaster of paris mixed with water to the consistency of cream. As soon as the top layer of plaster is dry, the jar is ready for use. To obviate the risk of cracking the jar owing... | |
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