A metallic wire or rod terminating at the lower end in a small iron or other metallic spoon or cup to hold the desired chemical substance, and fitted above with a metallic plate or with a cork, which may be adjusted beforehand, to fit a widemouthed stoppered jar or bottle, in which it is planned to make the experiment. Such an appliance can be used to illustrate the burning of phosphorus in oxygen gas as referred to under the heading of Chemical Interactions.

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