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{{HPB-SB-footer-sources}} | {{HPB-SB-footer-sources}} | ||
<gallery widths=400px heights=400px> | |||
SB-01-055-note-1.jpg|HPB's note | |||
scientific_american_v.33_n.10_1857-09-04.pdf|page=9|Scientific American, v. 33, No. 10, September 4, 1875, p. 151 | |||
scientific_american_v.33_n.10_1857-09-04.pdf|page=10|Scientific American, v. 33, No. 10, September 4, 1875, p. 152 | |||
</gallery> | |||