Pixii pyrometer, mid 19th century.

UNITED KINGDOM - NOVEMBER 25: A solid expands when it is heated, because its molecules vibrate more vigorously and need more space. This pyrometer, or 'heat-measurer', demonstrated how a metal rod increased in length as it was heated by a gas flame placed beneath it, and shrank again as it cooled. (Photo by SSPL/Getty Images)

Pixii pyrometer, mid 19th century.
UNITED KINGDOM - NOVEMBER 25: A solid expands when it is heated, because its molecules vibrate more vigorously and need more space. This pyrometer, or 'heat-measurer', demonstrated how a metal rod increased in length as it was heated by a gas flame placed beneath it, and shrank again as it cooled. (Photo by SSPL/Getty Images)
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來源: Science & Society Picture Library / Contributor

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編輯性內容編號：
90738193
圖像集:
SSPL
建立日期：
1998年11月25日
上傳日期：
授權類型：
權利管理
發佈資訊:
無許可授權 更多資料
來源：
SSPL
物件名稱：
10314152
最大檔案大小：
3504 x 2825 像素 (29.67 x 23.92 cm) - 300 dpi - 2 MB